The Sailors' Mosque (Montenegrin: Морнарскa џамија or Mornarska Džamija; Albanian: Xhamia e Detarëve) is an important landmark in Ulcinj, Montenegro that once served as a lighthouse.

[citation needed] It is assumed that they constructed the mosque so that their merchants could pray while trading on this part of the Adriatic Coast.

The fact that the mosque was erected before Islam was established in Ulcinj indicates the surprise of the Ottomans, having found the sacred place at the sea shore in 1571.

After 81 years it was rebuilt by private investors from Alanya, Turkey with the help of the Islamic Union of Montenegro and the Municipality of Ulcinj.

Local custom dictated that after major events or battles, the residents of the town should erect a mosque as a symbol of their gratitude to God.