The Ascension Cathedral (Russian: Вознесенский собор, Voznesenskij sobor), also known as Zenkov Cathedral, is a Russian Orthodox cathedral located in Panfilov Park in Almaty, Kazakhstan. Completed in 1907, it is claimed to be the second tallest wooden building in the world, but the church of Sap?nta and the monasteries of B?rsana and Peri, all in Maramures, Romania, are now all higher.

In the late 19th century the first bishops of the Turkistan eparchy discussed the need for a Russian Orthodox Church in Almaty. On September 26, 1903 the bishop of Turkestan and Tashkent, Paisii (Vinogradov) consecrated the foundation of the church. Construction lasted between 1904 and 1907. The belfry was erected on September 14, 1906. The cathedral survived the 1911 earthquake with minimal damage, even though it was built without any nails, which some bishops attributed to divine intervention, although some credit might also be given to the advanced anti-earthquake techniques invented or employed by the architect, Andrei Pavlovich Zenkov.

The inner structure of the cathedral was made in the artistic workshops of Moscow and Kiev. The iconostasis was painted by N. Khludov. After the Russian Revolution the cathedral was used to house the Central State Museum of the Kazakh Soviet Socialist Republic. From 1930 to 1940 it was used by important public organizations. The first radio transmitters in Almaty were situated in the cathedral's belfry.

Restoration work on the cathedral began in 1973 and lasted until 1976. In May 1995 control of the cathedral was returned to the Russian Orthodox Church, and after additional restoration work it was reopened for religious services in 1997.

The Church was entirely built of wooden details, connected by iron bolts. “At grandiose height – wrote Zenkov about church – it corresponded to very flexible construction. The belfry swung and bent, as the top of a tall tree and worked as a flexible timber. But that the building was built without any nail is just the widespread myth.

External view of the cathedral is different by bright walls and many-colored domes, but also the interior is distinguished by iconostasis painting and entire decoration, made in the early XX century in the workshops of Moscow and Kiev.