Xiguan Mosque, Islamic place of worship in downtown Lanzhou, China.

Xiguan Mosque is a four-story place of worship in downtown Lanzhou, built around a circular main hall that rests on twenty arches at ground level. The upper floors are reserved for prayer, while the lower levels house washing facilities and secondary rooms.

The mosque was built during the reign of the Wanli Emperor of the Ming dynasty. It was rebuilt twice under the Qing dynasty. In 1990 it was rebuilt again with a dome and four pagoda-topped minarets, and in 2023 the Lanzhou government removed the dome and minarets in a minimalist redesign.

The prayer hall displays Chinese wood carvings on its pillars alongside Arabic calligraphy on the walls. Walking through the space, visitors can read the two design languages side by side in a single room.

The mosque stands at 1 Cuiyingmen, Chengguan District, and its prayer hall holds over 3,000 people, so it is busiest around Friday midday prayers. Visitors should avoid those hours and dress modestly. The 2023 renovation removed the dome and minarets, so the exterior now looks different from older photographs and postcards.

The 1990 reconstruction copied the domed form of mosques in the Arab world, and the design was meant to echo the Al-Aqsa Mosque in Jerusalem. In autumn 2023 the Lanzhou government removed the dome and minarets and added a new dome and facade, part of a national effort to sinicize Islam in China.