 In 1905–1907, during the construction of a new post office in the Sirkeci district of Istanbul near the shore of the Golden Horn, pottery fragments were unearthed that were decorated with spiral designs on a white background.As a result, pottery with similar spiral patterns became known as 'Golden Horn ware'.It was not until the 1930s that art historians fully realised that the different styles of pottery were probably all produced in Iznik.