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利用者:VonTanami/砂場/丙

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ローマ煉瓦（英：Roman brick）とは、古代ローマ建築において使用された煉瓦の一種であり、ローマ人によって征服地にも広められたもの、またはそれに触発された近代の模倣的製品を指す。いずれの形式においても、現代の標準的な煉瓦に比べて、長く平たい形状を特徴としている。

レスターのJewry Wallには、ローマ煉瓦が使用されている。背景に見える20世紀に補強のため設けられたアーチには、現代の煉瓦が用いられている。


歴史

古代

ローマ人が焼成粘土煉瓦を発展させたのは帝政期以降であり、それ以前には、日光のみによって乾燥させる泥煉瓦が使用されていた。この種の煉瓦は構造的に脆弱であり、小規模な建物にしか適していなかった。

焼成煉瓦の技術は、ギリシア人によって先行して開発されていた方法を取り入れるかたちで、アウグストゥス治下にローマで発展が始まった。ローマで焼成煉瓦が使用されたことが年代的に確認できる最も初期の建造物は、紀元前13年に完成したマルケルス劇場である[1]。

窯によって煉瓦を乾燥させることで、乾燥時にひび割れが生じることを防ぐことが可能となった一方で、泥煉瓦は乾燥に長い時間を要し、製造時期が季節によって制約されるようになった[2]。これに対して焼成による煉瓦生産は大量生産が可能であり、ローマにおける煉瓦製造の飛躍的な増加をもたらした[3]。

 
The Constantine Basilica in Trier, built in Roman brick
 
The Red Basilica at Pergamon, built using Roman brick
 
Wall of the Roman shore fort at Burgh Castle, Norfolk, with alternating courses of flint and brickwork

ローマ煉瓦は現代の煉瓦と比較して一般的に高さが低かったが、さまざまな形状と寸法で製造されていた[4][5]。

形状には正方形、長方形、三角形、円形などがあり、最も大きなものでは長さ約91cmを超える煉瓦も確認されている[6]。

古代ローマにおける一般的な煉瓦の大きさは約44.4cm × 29.6cmであったが、最大で約38cm程度の変種も多く見られた。他の例としては、約61cm × 30cm × 10cm、約38cm × 20cm × 25cmといった寸法の煉瓦も存在していた。フランスで出土したローマ煉瓦は約20cm × 20cm × 7.5cmであった。また、トリーアのコンスタンティヌスのバシリカは、約38cm四方で厚さ約3.8cmのローマ煉瓦によって築かれている[7]。

なお、壁材として用いられたローマ煉瓦と、屋根材あるいは床材として用いられたタイルとの間に明確な差異が見られないことも多く、考古学者は「Ceramic building material」という包括的な用語を用いることがある。

The Romans perfected brick-making during the first century of their Empire and used it ubiquitously, in public and private construction alike. The mass production of Roman bricks led to an increase in public building projects.[2] Over time the public and private relationship diminished as the brick business turned into an imperial monopoly.[2] The Romans took their brickmaking skills everywhere they went, introducing the craft to the local populations.[7] The Roman legions operated mobile kilns and introduced bricks to many parts of the empire. The bricks became time records and geographical pinpoints to where the Roman military was operating.[3] Roman bricks are often stamped with the mark of the legion that supervised their production. Roman brick was used to construct famous architecture such as the Red Basilica in Pergamon, Domus Tiberiana and the Basilica of Maxentius in Rome.[8][2] The use of bricks in southern and western Germany, for example, can be traced back to traditions already described by the Roman architect Vitruvius, although he probably refers to mud brick. In the British Isles, the introduction of Roman brick by the Ancient Romans was followed by a 600–700 year gap in major brick production.

When building in masonry, the Romans often interspersed the stonework at set intervals with thin courses of bricks, sometimes known as "bonding tiles".[9] This was done in order to give the structure added stability, and was particularly valuable when building with irregularly shaped building materials such as flint as the bricks would help level up the bed. The practice also had a secondary aesthetic effect of giving a polychromatic appearance to the walls.

In the 1530s, the English antiquary John Leland successfully identified Roman bricks (albeit under the misleading designation of "Briton brykes") at several geographically dispersed sites, distinguishing them by size and shape from their medieval and modern counterparts. This has been described as one of the earliest exercises in archaeological typology.[10]

中世

 
The "Foraine" brick is a medieval heir of the Roman brick in the region of Toulouse (France), still used nowadays.

After the Fall of the Western Roman Empire in the 5th century, many of the commercial stone quarries in Europe were abandoned.[11] This led to a consistent pattern of the reuse of Roman building materials throughout the next several hundred years.[11] Like much of the Roman stone, Roman bricks were gathered for reuse during this period.[11] For example, in the 10th century, the abbots of St. Albans gathered enough Roman brick to have their own stockpile of the building material.[11]

When brick production resumed in earnest in the British Isles, the 1½" to 2" height of the Roman-style brick gradually increased during the early Medieval period.[12] Brick from the ancient Roman Empire was commonly reused in medieval Europe as well as in later periods.[13] This reuse can be found across the former Roman Empire.[13] In Great Britain, where construction materials are less plentiful, Roman structures were quarried for their stone and brick for reuse.[14] Examples of this type of reuse in Great Britain can be found in Anglo-Saxon churches at Brixworth, Corbridge, St. Martin's, Canterbury, and St Nicholas', Leicester, and also in St Albans Abbey church (now St Albans Cathedral).[14][15]

近現代

 
Modern Roman brick in Frank Lloyd Wright's 1905 Frank L. Smith Bank

Modern "Roman" bricks were introduced at the beginning of the 20th century. They are invariably longer and flatter than other modern brick types, but there are no fixed dimensions. Those used in the United States in the early 20th century had nominal dimensions of 4 by 2 by 12インチ (10 cm × 5 cm × 30 cm):[16][17] this gave them a 6:2:1 ratio, compared with a roughly 4:2:1 ratio of most modern brick types. Others with nominal dimensions of 16 by 6 by 4インチ (41 cm × 15 cm × 10 cm) are also known. Demand has increased the availability of all types of bricks; there are more than a dozen commercially available brick types in modern construction.[18] In 2011, the Roman Brick Company of Glasgow was offering "Roman" bricks in heights of 40, 52, 65 or 71mm; widths of 90 or 115mm; and lengths of 290, 365, 440, 490 and 600mm.[19]

Roman brick was introduced to the United States by the architectural firm McKim, Mead, and White.[20] At one time, Roman brick was one of three available brick types in the United States; the other two were "Standard" (dimensions of 3.625 by 2.25 by 7.625インチ (9 cm × 6 cm × 19 cm)[21]) and "Norman (dimensions of 4 by 2.66 by 12インチ (10 cm × 7 cm × 30 cm)[22])."[18] By 1920, there were at least five types of bricks commonly available to builders and architects, among them: Roman, Norman, Standard, English and Split.[23]

 
The Robie House in Chicago

Frank Lloyd Wright used Roman brick in his design for the Robie House in Chicago, and he favored it in many of his Prairie style homes.[16][17] For the Robie House, Wright selected a brick later known as "Pennsylvania Iron Spot Roman brick", personally traveling to St. Louis to choose it.[24] Wright's use of Roman brick in his masonry subtly emphasized the horizontal lines common to much of his Prairie style work.[25][26] Further highlighting Wright's horizontal emphasis was the use of recessed horizontal mortar joints of contrasting color to the brick.[25][26] The vertical joints were de-emphasized by ensuring the mortar was flush with, and of the same hue, as the brick.[25] Recently, as historic preservationists work to restore and preserve the work of Wright and his fellow Prairie School architects, Roman brick has proven difficult to obtain.[16][27]

Ancient Roman brick stamps

 
Ancient Roman stamp on a hypocaust brick, used by the third cohort of Roman citizens from Thrace

Around the middle of the 1st century BC Roman brick makers began using unique identifying stamps on their bricks.[28] The first of these brick stamps were simple and included minimal information, such as the name of a person and sometimes the name of the brickyard the brick was produced in.[28] These earliest Roman brick stamps were emblazoned into the wet clay using a hardwood or metal mold prior to the firing of the brick.[29] As the early Roman Empire progressed, fired brick became the primary building material and the number of brick producers increased dramatically as more and more wealthy land owners began to exploit clay deposits on their land for brick-making.[29] Brick stamps began to become more complex and the number of distinguished names multiplied on the brick stamps .[29] In 110, the stamps included, for the first time, the name of the consuls for the year of production, which allows modern observers to pinpoint the year a brick was created.[30]

These brick stamps, once viewed more as a curiosity than archaeological artefacts, allow scholars to learn about the demand for bricks in Ancient Rome because through the dates on the stamps they provide a chronology.[28] Today, brick stamp discoveries are carefully documented and that documentation, combined with the use of architectural context, has helped provide a reliable method of dating Ancient Roman construction.[28] In addition, brick stamps have proved helpful in determining general Ancient Roman chronology.[28]

Ancient Roman brickyards

Most of the Roman bricks were created at brickyards. These brickyards were typically at large estates owned by a wealthy family that had access to clay deposits.[3] There was a hierarchy in the brick production: the domini were the owners of the estate and were typically aristocrats, the officinatores, typically of lower middle class, supervised the brick making process and manufacturing of them, and the figlinae, typically slaves, were those who made the bricks.[3] Men, women, and children all served in varying degrees as members of the landowners, supervisors, and makers.[2] The brick stamps gave recognition to the domini, officinatores, the brickyard it was created at, and consuls serving at the time.[2] Regulations were made on the number of bricks that could be produced in a day and, past that limit, bricks became a public entity.[3]

A Roman brickyard owned by Domitia Calvilla, the mother of the Emperor Marcus Aurelius has been discovered at Bomarzo, 40 miles north of Rome.[31]

See also

 
ポータル Ancient Rome

Notes

  1. ^ Blagg
  2. ^ a b c d e f Anderson Jr., James (1997). Roman Architecture and Society. Baltimore: The Johns Hopkins University Press. pp. 151–166 
  3. ^ a b c d e Cancik, Hubert (2003). Brill's New Pauly. Boston: Brill. pp. 763–768 
  4. ^ Scalenghe, R., Barello, F., Saiano, F., Ferrara, E., Fontaine, C., Caner, L., Olivetti, E., Boni, I., Petit, S. (2015). “Material sources of the Roman brick-making industry in the I and II century A.D. from Regio IX, Regio XI and Alpes Cottiae”. Quaternary International 357: 189–206. Bibcode: 2015QuInt.357..189S. doi:10.1016/j.quaint.2014.11.026. hdl:11696/34721. https://zenodo.org/record/848899. 
  5. ^ Juracek, Jack (1996). Surfaces: Visual Research for Artists, Architects, and Designers. W. W. Norton. p. 310. ISBN 0-393-73007-7. https://books.google.com/books?id=Q1ZWyWDcq1YC&q=%22roman+brick%22+united+states&pg=PA310 
  6. ^ Peet, Stephen Denison (1911). The American Antiquarian and Oriental Journal. Jameson & Morse [etc.]. pp. 35–36. https://archive.org/details/americanantiqua39peetgoog. "roman brick stamps." 
  7. ^ a b Walters, Henry Beauchamp; Birch, Samuel (1905). History of Ancient Pottery: Greek, Etruscan, and Roman. J. Murray. pp. 330–40. https://archive.org/details/historyancientp00bircgoog. "introduced roman brick." 
  8. ^ Ozkaya, Ozlem (2009). “Properties of Roman bricks and mortars used in Serapis temple in the city of Pergamon”. Materials Characterization 4 (9): 995–1000. doi:10.1016/j.matchar.2009.04.003. hdl:11147/2488. 
  9. ^ de Graauw, A., 2016, Reinforced concrete?!
  10. ^ Harris, Oliver (2007). “John Leland and the 'Briton Brykes'”. Antiquaries Journal 87: 346–56. doi:10.1017/S0003581500000949. 
  11. ^ a b c d Stalley, Roger (1999). Early Medieval Architecture. Oxford University Press, USA. pp. 112–14. ISBN 0-19-284223-4. https://books.google.com/books?id=7qWcmCBUPO0C&q=Roman+Brick+Europe&pg=PA114 
  12. ^ Warren, John (1999). Conservation of Brick. Elsevier. p. 47. ISBN 0-7506-3091-4. https://books.google.com/books?id=AcWJDJM6iwUC&q=size+roman+brick&pg=PA47 
  13. ^ a b Barker, Graeme (1999). Companion Encyclopedia of Archaeology. 1. Routledge. p. 326. ISBN 0-415-21329-0. https://books.google.com/books?id=c4BZ7vu0WRsC&q=roman+brick+reuse&pg=RA3-PA326 
  14. ^ a b Ottaway, Patrick, and Cyprien, Michael. A Traveller's Guide to Roman Britain (Historical Times, 1987), p. 5, (ISBN 0-918678-19-6).
  15. ^ Smith, Terence Paul (2001). “Early recycling: the Anglo-Saxon and Norman re-use of Roman bricks with special reference to Hertfordshire”. In Henig, Martin; Lindley, Phillip. Alban and St Albans: Roman and Medieval Architecture, Art and Archaeology. British Archaeological Association Conference Transactions. 24. Leeds: British Archaeological Association. pp. 111–17. ISBN 1-902653-40-8 
  16. ^ a b c Papier, Sheryl. "The Quest for Reproduction Bricks for the Robie House Restoration," The Newsletter of The Historic Resources Committee, 25 July 2007, The American Institute of Architects. Retrieved 3 October 2007.
  17. ^ a b “Buffalo as an Architectural Museum”. Brick, The Buffalo FreeNet. University of Buffalo. 2007年2月21日時点のオリジナルよりアーカイブ。2007年10月3日閲覧。
  18. ^ a b Beall, Christine. Masonry Design and Detailing: For Architects and Contractors, (Google Books), McGraw-Hill Professional: 2003, pp. 49–50, (ISBN 0-07-137734-4). Retrieved 3 October 2007.
  19. ^ The Roman Brick Company website [1] Archived 2012-03-15 at the Wayback Machine.. Retrieved 28 July 2011.
  20. ^ Scully, Vincent Joseph (1971). The Shingle Style and the Stick Style: Architectural Theory and Design from Downing to the Origins of Wright. Yale University Press. p. 149. ISBN 0-300-01519-4. https://books.google.com/books?id=V3NAnoGM4lIC&dq=introduced+roman+brick&pg=RA1-PA149 2007年10月3日閲覧。 
  21. ^ “A Guide to Brick Shapes and Sizes | Batchelder & Collins”. Brick, Stone Veneer & Concrete Pavers | Batchelder & Collins | Norfolk & Williamsburg - Brick, Block, Pavers, Masonry Accessories & Tools (2022年9月8日). Template:Cite webの呼び出しエラー：引数 accessdate は必須です。
  22. ^ “Technical Notes 2 - Glossary of Terms Relating to Brick Masonry”. 2023年6月6日時点のオリジナルよりアーカイブ。 Template:Cite webの呼び出しエラー：引数 accessdate は必須です。
  23. ^ Johnson, Nathan Clark and Hool, George Albert. Handbook of Building Construction: Data for Architects, Designing and Constructing Engineers, and Contractors, (Google Books), McGraw-Hill Book Company, Inc.: 1920, p. 915. Retrieved 3 October 2007.
  24. ^ Hoffmann, Donald. Frank Lloyd Wright's Robie House: The Illustrated Story of an Architectural Masterpiece, (Google Books), Courier Dover Publications: 1984 p. 42, (ISBN 0-486-24582-9). Retrieved 3 October 2007.
  25. ^ a b c Lind, Carla. Frank Lloyd Wright's Fireplaces, (Google Books), Pomegranate: 1995, p. 14, (ISBN 0-87654-469-3). Retrieved 3 October 2007.
  26. ^ a b Roth, Leland M. American Architecture: A History (Google Books), Westview Press: 2001, (ISBN 0-8133-3662-7), p. 308. Retrieved 3 October 2007.
  27. ^ Weil, Zarine. Building a Legacy: The Restoration of Frank Lloyd Wright's Oak Park Home and Studio, (Google Books), Pomegranate: 2001, p. 124, (ISBN 0-7649-1461-8). Retrieved 3 October 2007.
  28. ^ a b c d e Anderson, James and Widrig, Walter. "Brick Stamps Archived 2015-05-23 at the Wayback Machine.", Via Gabina Villas Excavation, Rice University, 2002, accessed July 21, 2009.
  29. ^ a b c Bodel, John P. Roman brick stamps in the Kelsey Museum, (Google Books link), University of Michigan Press, 1983, p. 1, (ISBN 0-472-08039-3).
  30. ^ Opper, Thorsten. Hadrian: Empire and Conflict, (Internet Archive link), Harvard University Press, 2008, pp. 108-09, (ISBN 0-674-03095-8).
  31. ^ name = "Nick Pisa, Daily Telegraph, 2 October, 2005"

References

  • Blagg, T.F.C., "Brick and tile" section, in "Architecture, 1, a) Religious", section in Diane Favro, et al. "Rome, ancient." Grove Art Online. Oxford Art Online. Oxford University Press, accessed March 26, 2016, subscription required

Further reading

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