Joggle (architecture)

{{Short description|Joint that interlocks blocks}}

File:Puerta de Damasco, Jerusalén, 2017 04 (cropped) - joggling above a window.jpg, Jerusalem ]]

File:Voussoirs, Mausoleum of Theodoric, Ravenna, 2012 (cropped).jpg, Ravenna: joggles{{cite book |last=von Reber |first=Franz |title=History of Mediaeval Art |date=1887 |publisher=Harper & brothers |page=205 |url=https://books.google.com/books?id=g7-fAAAAMAAJ&pg=PA205 |quote=The round arches of these niches show a joggling of the voussoirs rare in Roman architecture}} resembling rabbets (rebates) ]]

A joggle is a joint or projection that interlocks blocks (such as a lintel's stone blocks or an arch's voussoirs).

Often joggles are semicircular and knob-shaped, so joggled stones have a jigsaw- or zigzag-like pattern.

Joggling can be found in pre-Frankish buildings, in Roman Spain and Roman France.{{cite book |last=Boas |first=Adrian J. |title=Domestic Settings: Sources on Domestic Architecture and Day-to-Day Activities in the Crusader States |date=2010 |publisher=Brill |isbn=978-90-04-18272-1 |url=https://books.google.com/books?id=w_TDE--C2F4C&pg=PA68 | page=68}}

In Islamic architecture, the earliest joggles were in the desert castles of the Umayyad Caliphate, such as Qasr al-Hayr al-Sharqi.

In Mamluk architecture, joggling is usually combined with ablaq (alternating colors).

Joggling also characterize Ottoman architecture in Cairo.{{cite book |last=AlSayyad |first=Nezar |author-link= Nezar AlSayyad | title=Cairo: Histories of a City |date=2011 |publisher=Harvard University Press |isbn=978-0-674-06079-1 |page=164 |url=https://books.google.com/books?id=kM9Ia0a2gCAC&pg=PA164}}

The protruding joggle is also called a "he-joggle", whereas the corresponding slot is called a "she-joggle".{{cite book |last=Hodgson |first=Frederick Thomas |title=The 20th Century Bricklayer's and Mason's Assistant |date=1905 |publisher=F.J. Drake & Company |page=241 |url=https://books.google.com/books?id=04s6AAAAMAAJ&pg=PA241}}