The Old City of Sanaa is a historic area in the capital of Yemen, known for its unique architecture and rich cultural heritage. It features over 6,000 buildings, many of which date back to the 11th century. The city is famous for its distinctive tower houses made of mud brick, adorned with intricate geometric patterns and colorful stained glass. Designated as a UNESCO World Heritage Site in 1986, the Old City is a significant center for Islamic culture and history. Key landmarks include the Great Mosque of Sanaa and the Al Saleh Mosque, showcasing the city's architectural beauty and historical importance.