Konzilsgedächtniskirche Lainz Speising, Modern parish church in Lainz, Austria.

The Konzilsgedächtniskirche Lainz-Speising is a Roman Catholic parish church at Kardinal-König-Platz 1 in Vienna's 13th district, Hietzing. Built 1967–1968 to a design by Josef Lackner, it is a square central-plan building that appears as a broad, low cube beside Lainzer Straße. Its four entrances are set into the building's corners, and the facade combines five rows of Leca concrete blocks with smooth concrete surfaces.

The building was constructed between 1967 and 1968 based on designs by architect Josef Lackner and replaced a Neo-Romanesque predecessor from 1885. This new church embodied the modern spirit of the postwar era and church reforms.

The church was built as a memorial to the Second Vatican Council and reflects the reformed direction of this church assembly. Its name reminds visitors daily of this historical turning point in the Catholic Church.

The church stands at Kardinal-König-Platz 1 in Hietzing, Vienna's 13th district, beside the old Lainz parish church site on Lainzer Straße. The square central building has an entrance in each of its four corners, so visitors can enter from different sides. It is a working parish church, so check Mass times before visiting.

The exterior is clad with five rows of Leca concrete blocks, giving the building a factory-like appearance. This unusual look makes the church a notable example of functional industrial aesthetics applied to a sacred structure.