Schloss Ittendorf, Medieval castle in Markdorf, Germany.

Schloss Ittendorf stands on a hill at about 440 metres above sea level in the Ittendorf district of Markdorf. The three-storey building has stepped gables and is enclosed by a medieval ring wall. It was built by Einsiedeln Monastery in the 17th century on the site of an earlier castle and expanded between 1671 and 1677 as a governor's residence.

The castle was first documented around 1260 and built by the Schenken von Schmalegg family before being sold to Salem Monastery in 1302. This early ownership history shows the shifting importance of the site for different powers in the region.

The castle and St. Martin's Church are considered landmarks of Ittendorf. The Baden Farmers School was founded in the castle on 22 November 1931 under Lambert Schill, in the presence of Minister Andreas Hermes, and inaugurated after renovation work; it was forcibly dissolved in 1933 and re-established in Schwerzen after the Second World War.

The privately managed castle sits near St. Martin's Church in the Ittendorf district and can be reached via local roads in the Bodenseekreis region. Visitors should know that the building is privately used and can only be viewed from the outside.

From 1931 to 1933 the castle housed the Baden Farmers School before it was forcibly closed. This episode shows how the site's use changed fundamentally with the political shifts of that era.