The district of Karaca Ahmed is an exceptional place lying amongst the oldest streets of Usküdar such as Nuhkuyusu, İcadye Tunusbağı, Çiçekçi, Talimhane, Haydarpasha, and Harmanlık.
Karaca Ahmed was the son of Süleyman Bey of Khrosan. He came to Anatolia with the great Turkish nomedic groups which migrated to Anatolia in in the 14th century to escape the Mongol raids. At thi time, the Seljuk sultanate was in decline. Sultan Karaca Ahmed joined the forces that wanted to conquer the declining Byzantine Empire. Later, Sultan Karaca Ahmed, helped the people of Anatolia as a doctor.
Today, however, the name Kara Ahmed generally reminds the people of Istanbul of death. The reason for this is that the Karaca Ahmed cemetery, the largest and oldest Muslim cemetery in Turkey, is in this district.
The establisment of the cemetery dates back many centuries. It is thought that tha soldiers who were martyred during the sieges of Constantinople were buried here. The cemetery has never contained any Roman or Byzantine graves. The following are the most imortant historical relies in Karaca Ahmed.