11. A dome resting on squinches is over the crossing in front of the altar. 12. Architecturally they form multiple tiers of squinches , diminishing in size as they rise. 13. Originally the top level was covered by a conical timber roof carried on squinches . 14. The squinches are filled with carved plaster muqarnas. 15. When the mosque was originally built this technique of using plain squinches was considered classical. 16. It is surmounted by a dome carried on squinches and raised on an octagonal drum. 17. On the first floor there is an oriel window in the corner, above carved squinches . 18. Above the prayer hall sits a brick one-bay dome carried on four brick squinches . 19. A large brick dome supported by brick squinches is also situated atop the mausoleum of Kujuk. 20. It is of brick faced with stone, supported on brick squinches built into the Norman tower.
