Heydar Mosque, also known as the Islamic Center of Baku, is a mosque located in Baku, the capital of Azerbaijan. The mosque was constructed in 2012 and was opened to the public in 2014. It is named after Heydar Aliyev, the former President of Azerbaijan, who passed away in 2003.

The Heydar Mosque is one of the largest mosques in the Caucasus region and can accommodate up to 10,000 worshippers at a time. The mosque's exterior is decorated with intricate Islamic motifs and calligraphy, while the interior is adorned with chandeliers, stained glass windows, and carpets.

In addition to serving as a mosque, the Heydar Mosque also functions as an Islamic cultural center, hosting conferences, seminars, and exhibitions. The complex includes a library, classrooms, and a lecture hall, as well as a restaurant and a souvenir shop.

The mosque is open to visitors of all faiths, and guided tours are available for those who want to learn more about its history and significance. It is considered to be one of the most significant landmarks in Baku, attracting thousands of tourists every year.