The Gayer-Anderson Museum beside the Ibn Tulun mosque was built as a private residence in 1540 and amalgamated with a neighboring house called the house of the Cretan Woman ( Bayt al-Kritliya ) dating from 1631 .
In 1540 , beside the Ibn Tulun mosque , the Gayer-Anderson Museum was built as a private residence , and amalgamated with a neighboring house called the house of the Cretan Woman .