The Aladža Mosque is a medieval mosque located in Foca, Bosnia and Herzegovina. It was built in the 16th century and is considered one of the most significant Ottoman structures in the country. The mosque is made of stone and has a rectangular shape, with a large dome on top. The interior is decorated with intricate calligraphy and geometric designs. The mosque suffered significant damage during the Bosnian War in the 1990s but has since been restored to its former glory. It is now a popular tourist attraction in Foca and an important cultural monument of Bosnia and Herzegovina.