Tripoint: Tromejnik (SI), Dreilanderecke (A), Harmashatar (H) (virtual excursion) is a border point of three countries: Slovenia, Austria and Hungary (elevation 390 m, latitude: 46,8691° N, longitude:16,1138° E). On the summit of the 'non-panoramic' with forest covered hill is situated a pyramid which presents a juncture of three countries. The pyramid was build on May 31st 1924 by the Border Committee of the Treaty of Trianon. Each side of the pyramid is with the coat of arms of the bordering countries and positioned to the direction of the each country. The pyramid is with the engraved text with the datum of the defined border (September 10th 1919 and June 4th 1920). The access to the summit is possible from all three countries.
The Treaty of Trianon was the peace agreement signed in 1920, at the end of First World War , between the Allies of World War I and the Kingdom of Hungary (one of the successor states to Austria-Hungary).The treaty regulated the status of an independent Hungarian state and defined its borders. The treaty left Hungary as a landlocked state covering 93,073 square kilometers, only 28% of the 325,411 square kilometers (125,642 sq mi) that had constituted the pre-war Kingdom of Hungary (the Hungarian half of the Austro-Hungarian monarchy). Its population was 7.6 million, only 36% of the pre-war kingdom's population of 20.9 million. The areas that were allocated to neighboring countries in total (and each of them separately) possessed a majority of non-Hungarian population, but 31% of Hungarians,3.3 million was left outside of post-Trianon Hungary. Five of the pre-war kingdom's ten largest cities were drawn into other countries, and post-Trianon Hungary was left without direct access to the sea. The treaty limited Hungary's army to 35,000 officers and men, while the Austro-Hungarian Navy ceased to exist.
The principal beneficiaries of the treaty's territorial division were the Kingdom of Romania, Czechoslovakia, and the Kingdom of Serbs, Croats and Slovenes (Yugoslavia). One of the main elements of the treaty was the doctrine of "self-determination of peoples" and it was an attempt to give the non-Hungarians their own national states. In addition, Hungary had to pay war reparations to its neighbors. The treaty was dictated by the Allies rather than negotiated and the Hungarians had no option but to accept its terms. The Hungarian delegation signed the treaty under protest on 4 June 1920 at the Grand Trianon Palace in Versailles, France. The treaty was registered in League of Nations Treaty Series on 24 August 1921.
(source: info boards on location, august 8th 2014, Wikipedia august 11th)
