St. Markus Kirche, Vienna, Modern Orthodox church in Donaustadt, Vienna, Austria

The Coptic Church of St. Mark is a freestanding hall church in Vienna-Kaisermühlen, built in 1917 to a design by Hans Prutscher. It combines exposed brickwork with a plastered entrance facade bearing relief medallions, topped by a gable rider with a crucifix. Between the two entrance portals sits a large majolica relief of the Crucifixion with soldiers, made in 1933 by sculptor A. Fleischmann to a design by Otto Prutscher.

The building was constructed in 1917 during World War I by Russian prisoners of war following architect Hans Prutscher's designs. After the war, the original Catholic emergency chapel gradually became home to the Coptic Orthodox community.

The church serves as a central meeting place for Vienna's Coptic Orthodox community. It shapes local spiritual life through regular services and community gatherings in this district.

The church stands at Wagramer Straße in Kaisermühlen, a short walk from the Vienna International Centre and the Alte Donau U-Bahn station. It is a consecrated Coptic Orthodox church, so visits are best timed outside the regular liturgy; the interior was rearranged for Coptic rites, with the altar screened from the congregation.

A large majolica relief by sculptor A. Fleischmann from 1933 adorns the entrance and commemorates fallen soldiers from World War I. This artistic element connects the building's wartime origins with its later transformation into a community space.