Saint John the Evangelist church in Aigen, Heritage church in Aigen-Schlägl, Austria.

Saint John the Evangelist church in Aigen im Mühlkreis is a late historicist building with neo-Gothic and some neo-Romanesque forms, erected 1897–1901 to plans by Raimund Jeblinger. Its wide, raised central nave has a barrel vault with applied cross ribs over octagonal pillars, flanked by narrow side aisles with cross-ribbed vaults. The two-storey west facade, with a central Gothic tower, stands nearly on the axis of the market square.

The parish was first documented in 1411. A late Gothic predecessor church was built between 1484 and 1529 and damaged by fires in 1802 and 1852. From 1897 to 1901 the church was rebuilt to plans by architect Raimund Jeblinger, keeping the Gothic west tower restored in 1856. A full restoration followed in 1991.

The high altar, donated by local linen manufacturer and mayor Simon Stoll and his wife, was made in Carrara marble by the Linz branch of the Innsbruck firm Josef Linser & Söhne between 1897 and 1901; it stands seven metres high with a 3.3-metre mensa. At the end of 1907 the couple had it widened so it fitted the presbytery better. The choir windows of 1900 show John the Evangelist on Patmos and the coats of arms of Schlägl Abbey and the municipality.

The church is located at the heart of the town and is easy to find when walking through the town center. Visitors should remember that this is an active place of worship, so it is best to check in advance about visiting times and access.

The high altar, donated by local linen manufacturer and mayor Simon Stoll and his wife, was made in 1897–1901 by the Linz branch of the Innsbruck firm Josef Linser & Söhne. It is carved from Carrara marble, stands seven metres high and has a 3.3-metre-long mensa; at the end of 1907 the Stolls had it widened so it fitted the presbytery better.