Bibi-Heybat Mosque is a historical mosque located on the coast of the Caspian Sea in Baku, Azerbaijan. The mosque was originally built in the 13th century by Shirvanshah Farrukhzad II Ibn Ahsitan II, but was later reconstructed in the 1990s.

The mosque has a rich history, as it is the burial place of Ukeyma Khanum, a descendant of the Prophet Muhammad, who was brought to Baku by her husband, Shirvanshah Khalilullah I, in the 15th century. The mosque became an important place of pilgrimage and worship for Muslims in the region.

The original mosque was destroyed by the Soviet government in the 1930s, but reconstruction began in 1998 with the support of the Azerbaijani government and the Heydar Aliyev Foundation. The new mosque was designed to resemble the original, with a blue dome and minarets.

Bibi-Heybat Mosque is now one of the most important religious and cultural landmarks in Azerbaijan, attracting both tourists and worshippers from around the world. It is also an important symbol of the country's rich Islamic heritage and its commitment to preserving its cultural identity.