The Hadum Mosque in Gjakova, Kosovo was built in the last decade of the 16th century (1594/95) by the architect Mimar Sinan. Its building was financed by Hadum Sylejman Efendia – Hadum Aga, which explains the name of the mosque. The mosque was built on the property of Jakë Vula and is located in the Old Bazaar. A rectangular, dome-covered structure, it belongs to the classic forms of mosque of the Islamic-Kosovar style. Around the mosque there are tombs with sculpted decorations and engraved with epithets in the old Ottoman language. The tombs belonged to the most respected families in Gjakova. There also used to be a "hamam", but it was destroyed during World War II. The entrances are covered with floral paintings, geometrical shapes, citations from the Qur'an and arabesques. In 1999, the