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Joggle (architecture)
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<p>A joggle is a joint or projection that interlocks blocks (such as a <a href="/facts/Lintel/JtoKkefa">lintel</a>'s stone blocks or an arch's <a href="/facts/Voussoir/uNmV8wma">voussoirs</a>). Often joggles are semicircular and knob-shaped, so joggled stones have a jigsaw- or zigzag-like pattern. </p><p>Joggling can be found in pre-Frankish buildings, in <a href="/facts/Roman_Spain/EYd2cv27">Roman Spain</a> and <a href="/facts/Roman_France/lwD5gbaV">Roman France</a>. In <a href="/facts/Islamic_architecture/AI0CuqTL">Islamic architecture</a>, the earliest joggles were in the <a href="/facts/Desert_castles/Cez4xAhm">desert castles</a> of the <a href="/facts/Umayyad_Caliphate/gdW8JwoK">Umayyad Caliphate</a>, such as <a href="/facts/Qasr_al-Hayr_al-Sharqi/PN40NYpk">Qasr al-Hayr al-Sharqi</a>. In <a href="/facts/Mamluk_architecture/KX8srITw">Mamluk architecture</a>, joggling is usually combined with <a href="/facts/Ablaq/fjJJq6LD">ablaq</a> (alternating colors). Joggling also characterize <a href="/facts/Ottoman_architecture/oXdyCPTC">Ottoman architecture</a> in Cairo. </p><p>The protruding joggle is also called a "he-joggle", whereas the corresponding slot is called a "she-joggle". </p>