https://en.wikipedia.org/wiki/Ablaq
Palace using ablaq technique
Excerpts
Ablaq (Arabic: particolored; literally 'piebald'[1]) is an architectural style involving alternating or fluctuating rows of light and dark stone.[2][3]
Ablaq
Mosque of al-Zahir Baybars portal Ablaq (Arabic: أبلق; particolored; literally 'piebald'[1]) is an architectural style involving alternating or fluctuating rows of light and dark stone.[2][3] Records trace the beginnings of this type of masonry technique to the south parts of Syria.[4] It is associated as an Arabic term,[5] especially as related to Arabic Islamic architectural decoration.[6] The first recorded use of the term ablaq pertained to repairs of the Great Mosque of Damascus in 1109,[4] but the technique itself was used much earlier.[7]
Technique
This technique is a feature of Islamic architecture.[2] The ablaq decorative technique is a derivative from the ancient Byzantine Empire, whose architecture used alternate sequential runs of light colored ashlar stone and darker colored orange brick.[4] The technique itself, however, was used much earlier, Mosque–Cathedral of Córdoba being a notable example,[7] Medina Azahara, and possibly Al-Aqsa Mosque, as well as the Dome of the Rock.
The Mamluks utilized mottled light effects and chiaroscuro in their buildings, and among the architectural elements that complemented it was ablaq. Finely dressed ashlar stones was often combined with brickwork for vaults. These Mamluk and Syrian elements were applied and shared by the Ayyubids and Crusaders in Palestine, Syria, and Egypt.[8]
History
In 1266 – 1269 Sultan al-Zahir Baybars al-Bunduqdari built a mosque known as Mosque of al-Zahir Baybars or the Qasr Ablaq Palace which was constructed with alterations of light and dark masonry. Based on this mosque, ablaq as a masonry technique of alternate rows of light and dark, was fully in use in the thirteenth century.[4][9]
The Mamluk architecture of Syria, Egypt and Palestine adopted the ablaq technique in the fourteenth and fifteenth centuries. In these countries at about this time black and white stone were often used as well as red brick in recurring rows, giving a three colored striped building.[4]
The ablaq masonry technique is used in the Azm Palace in Damascus and other buildings of the Ottoman period. In fact, Dr.Andrew Petersen, Director of Research in Islamic Archaeology at the University of Wales Lampeter states that ablaq (alternating courses of white limestone and black basalt is "A characteristic of the monumental masonry of Damascus.")[10]
At the Dome of the Rock in Jerusalem, ablaq lintels in alternating red and white courses are combined to highlight the voussoirs of the Great Arch.[11] Jerusalem mamluk architecture (period 1250 AD to 1516 AD) include multi-colored masonry in white, yellow, red and black.[12] The origins of the marble ablaq treatments at the Dome are controversial, some theorizing them original, and some saying they were later additions (and differing then as to the dates and identity of the builders).[5]
In Jordan, the Mamluk fortified khan at Aqaba (ca 1145) is a medieval fortress modeled after those used by the Crusaders. It contains an arch above the protected entrance. The horseshoe arch has ablaq masonry, harkening to Mamluk architecture in Egypt.[13]
Pisan ecclesiastical monuments—particularly the Cathedral of Pisa and Church of San Sepolcro (commenced building 1113)—used ablaq, not simple "black and white in revetment" between the conquest of Jerusalem in the First Crusade (1099) and the completion of the latter ca. 1130. Various architectural motifs—ablaq, the zigzag arch, and voussoir (rippled and plain) were used. These embellishments were a direct appropriation of Moslem architecture, resulting from pilgrimage to Jerusalem, and war against the Saracen in the First Crusade. Those visitors to Jerusalem could see ablaq at the Dome of the Rock, and at the Church of the Holy Sepulchre, as well as other examples that may no longer be extant. Thus zigzags (see Norman architecture) and ablaq became part of the repertoire of Romanesque architecture.[5][14]
South Carolina architect John Henry Devereux created a striking black and white ablaq edifice in the St. Matthew's German Evangelical Lutheran Church. However, that original conception has since been plastered over in monochrome red.