Trenčín is a city in western Slovakia of the central Váh River valley near the Czech border, around 95 km (59 mi) from Bratislava. It has a population of more than 55,000, which makes it the eighth largest municipality of the country and is the seat of the Trenčín Region and the Trenčín District. It has a medieval castle, Trenčín Castle, on a rock above the city.

Slovakia, officially the Slovak Republic, is a landlocked country in Central Europe. It is bordered by Poland to the north, Ukraine to the east, Hungary to the south, Austria to the west, and the Czech Republic to the northwest. Slovakia's mostly mountainous territory spans about 49,000 square kilometres (19,000 sq mi), hosting a population exceeding 5.4 million. The capital and largest city is Bratislava, while the second largest city is Košice.