The Cathedral of the Nativity of Christ, also known as the Nativity of Christ Cathedral, is a Russian Orthodox cathedral located in Riga, Latvia. The cathedral was built between 1876 and 1883 as a tribute to Tsar Alexander II of Russia.

The cathedral's architecture is inspired by the medieval Russian Uspenski Cathedral in Moscow, and features five distinctive domes topped with crosses. The facade of the cathedral is decorated with ornate carvings and reliefs, while the interior is richly decorated with intricate frescoes, mosaics, and icons.

During Soviet rule, the cathedral was closed and used for various secular purposes, including as a planetarium and as a concert hall. However, after Latvia regained its independence in 1991, the cathedral was returned to the Russian Orthodox Church and underwent extensive restoration work.

Today, the Nativity of Christ Cathedral is one of the largest Orthodox churches in Latvia and a popular destination for tourists visiting Riga. The cathedral hosts regular worship services, as well as concerts and other cultural events.