Sandomierz is a historic town in south-eastern Poland with 23,863 inhabitants, situated on the Vistula River near its confluence with the San, in the Sandomierz Basin. It has been part of Świętokrzyskie Voivodeship since its transfer from the Tarnobrzeg Voivodeship in 1999. It is the capital of Sandomierz County. Sandomierz is known for its preserved Old Town, a major cultural and tourist attraction which the President of Poland declared a National Monument of Poland in 2017.

Poland, officially the Republic of Poland, is a country in Central Europe. It extends from the Baltic Sea in the north to the Sudetes and Carpathian Mountains in the south, while its longest river is the Vistula. Poland has a temperate transitional climate and is the fifth-most populous member state of the European Union, with its sixteen voivodeships having a total population of over 38 million and covering a combined area of 312,696 km2 (120,733 sq mi). It is bordered by Lithuania and Russia to the northeast, Belarus and Ukraine to the east, Slovakia and the Czech Republic to the south, and Germany to the west. The nation's capital and largest metropolis is Warsaw. Other major cities include Kraków, Wrocław, Łódź, Poznań, and Gdańsk.