The ottomans also left many magnificent mosques and medreses, as well as many more fine Wood-and-Stone Houses.
Before Ottoman Times the most common form of mosques was a large square or rectangular space sheltered by a series of small domes resting on pilars as in Edirne's Eski cami. But when the Ottomans took Bursa and İznik in the early 14th century they were exposed to Byzantine architecture, particularly ecclesiastical architecture. Ottoman architects absorbed these influences and blended them with the styles of Sassanian Persia to develop a completely new style: the T-shape plan. The Ucserefeli Cami in Edirne become the model for other mosques not only because it was one of the first forays into this T- plan, but also because it was the first Ottoman mosque to have wide dome and a forecourt with an ablutions fountain.
Each imperial mosque had a külliye , or collection of charitable institutions, clustered around it. These might include a hospital, asylum for the insane, orphanage, imaret (soup kitchen), hospice for travellers, medrese, library, baths and a cemetery in which the mosque's imperial patron, his or her family and other notables could be buried. Over time, many of these buildings were demolished or altered, but Istanbul's Süleymaniye mosque complex still has much of it's kulliye intact.
The design, perfected by Ottoman's most revered architect Mimar Sinan during the reign of Süleyman the Magnificent, proved so durable that it is pricey so durable that it will still being used with variations for modern mosques all over Turkey