The city is on the old Silk Road between China and the West, and is an Islamic centre for scholarly study. In the 14th century, it became the capital of the empire of Timur (Tamerlane), and is the site of his mausoleum, the Gur-e Amir. The Bibi-Khanym Mosque remains one of the city's most famous landmarks. The Registan was the ancient centre of the city.