Schloss Altenhof, Castle complex in Pfarrkirchen im Mühlkreis, Austria

Schloss Altenhof is a castle in Altenhof, part of Pfarrkirchen im Mühlkreis in Upper Austria's Rohrbach district. The present building was rebuilt after the 1682 fire by Count Johann Reichard von Salburg, and after another fire in 1724. Its baroque chapel, consecrated in 1708 to St Mary, is considered Austria's largest private castle church and has a richly stuccoed interior.

Schloss Altenhof was first documented in 1204, when it belonged to Wernhardus de Altinhoven and formed part of the Falkenstein estate. In 1602 it passed to the Salburg family, who united it with Falkenstein and rebuilt it. After a fire in 1682, Count Johann Reichard von Salburg gave the castle its present form; a fire in 1724 destroyed it again, and it was rebuilt.

The baroque Schlosskirche, consecrated in 1708 to the Virgin Mary and later dedicated to St Joseph and Our Lady of Mount Carmel, is considered Austria's largest private castle church and has a richly stuccoed interior. Since 1981 Clemens Hellsberg, head of the Vienna Philharmonic from 1997 to 2014, has organised summer benefit concerts here for the Maltese Hospital Service.

The castle rooms are used for weddings, celebrations and seminars, and the castle nursery on the grounds is freely accessible. The castle church opens on Sundays at 8 a.m. The main castle wing belongs to the Salburg-Falkenstein family and is not open to the public.

Since 1981, Clemens Hellsberg, head of the Vienna Philharmonic from 1997 to 2014, has organised summer benefit concerts at the castle for the Maltese Hospital Service. The castle church is open on Sundays at 8 a.m., and the castle nursery on the grounds is freely accessible.