Dagstuhl is a computer science research center in Germany, located in and named after a district of the town of Wadern, Merzig-Wadern, Saarland.

Construction of the historic country house was started in 1760 on the orders of Count Joseph Anton Damian Albert von Oettingen-Baldern and Soetern, its chapel was built in 1763.

From 1839 to 1880, Octavie Elisabeth Maria de Lasalle von Louisenthal, dubbed the Painter Countess, worked on painting the chapel.

The de Lasalle von Louisenthal family made additions to the manor in 1905 and 1906, partly remodelling it in the neo-gothic style and adding the tower.

[2] The last de Lasalle von Louisenthal to own the manor, Theodor Stephan Josef Heinrich de Lasalle von Louisenthal, died in a mental hospital in 1959 without leaving a legitimate heir, having been sterilized on account of the Nazi's Sterilisation Law as he suffered from depression and confusion after he was shot down with his fighter plane during the First World War.

[4] Schloss Dagstuhl was acquired in 1957 by an order of Franciscan nuns, who converted many rooms to living quarters, installed central heating, wires for electricity, new bathroom facilities, and pipes for water.

During the renovations, which also took into account that the bishop of Trier had chosen Schloss Dagstuhl as one of his vacation locations, the old wooden staircase was replaced by today's marble one.

Dagstuhl Seminars, which are established after review and approval by the Scientific Directorate, bring together personally invited scientists from academia and industry from all over the world to discuss their newest ideas and problems.

[9][10] Apart from the Dagstuhl seminars, the center also hosts summer schools, group retreats, and other scientific events, all discussing informatics.