The manor was established in the 16th century and its centre was built to a more impressive style in the beginning of the 20th century, when it belonged to von Ditmars. Around 1910 the Art Noveau-style main building was built by the design of Otto Wildau. Today Holdre manor is privately owned.References:
The Peace Palace (Vredespaleis) is an administrative building and often called the seat of international law because it houses the International Court of Justice (which is the principal judicial body of the United Nations), the Permanent Court of Arbitration, the Hague Academy of International Law, and the extensive Peace Palace Library. In addition to hosting these institutions, the Palace is also a regular venue for special events in international policy and law. The Palace officially opened on 28 August 1913, and was originally built to provide a symbolic home for the Permanent Court of Arbitration, a court created to end war which was created by treaty at the 1899 Hague Peace Conference.