Transfiguration Cathedral, Eastern Orthodox cathedral in Nizhny Novgorod Fair, Russia.

The Transfiguration Cathedral is a white stone church built in the Russian Empire style, with a large central black dome and two smaller flanking domes, each topped by a gold cupola. The central drum is ringed by white columns and tall arched windows. A portico with four white columns frames a dark relief of a winged figure against a cross-shaped panel.

Construction took place between 1818 and 1822 under engineer Augustin Betancourt and architect Auguste Montferrand, who applied classical principles to Orthodox religious architecture. The building was completed during a period when the fair became one of Russia's most important commercial centers.

The cathedral's name comes from the Transfiguration of the Saviour, to which the main altar is dedicated. The north side chapel honours Alexander Nevsky and the south chapel Macarius of Zheltovodsk, a local saint. The iconostasis painted by Giuseppe Torricelli showed partially nude saints and offended believers, so it was replaced by a new one by Vasily Stasov. Since 2009 a monument to Chernobyl victims, an angel with crossed arms, stands near the cathedral.

The cathedral stands on the left bank of the Oka, on the former fairgrounds; the ground there was marshy and flood-prone, so the church was built on a pile-like foundation. It is an active Orthodox church, so modest dress and quiet behaviour are expected during services. The Chernobyl memorial with its crossed-armed angel stands by the building.

The cathedral stands on the left bank of the Oka on a pile-like foundation, because the marshy ground was prone to flooding. Its first iconostasis, painted after designs by the Italo-Swiss artist Torricelli, showed partly nude saints and offended believers, so Vasily Stasov made a replacement. Since 2009 a monument to the victims of Chernobyl, an angel with crossed arms, stands by the church.