The Combatants Park (), also known as the Koelichen Park (; ), is an urban park in Warsaw, Poland, located within the Wà Âochy district. It is placed between Obroà Âców Pokoju, Cianista, à Âwierszcza, Chroà Âcickiego, and à Âuki Wielkie Streets, within the neighbourhood of New Wà Âochy. It has an area of 5.06 ha (1250.353 acres). It includes the Koelichen Palace, a historic neoclassical palace dating to 1859, which currently houses a public library. The park was originally developed as a garden around a palace residence, founded around 1800, by politician and statesman Tadeusz Antoni Mostowski, a politician and statesman. In 1842, it was redeveloped as English landscape garden, together with construction of a new residence, which was later replaced in 1859 by the Koelichen Palace.
In the first half of the 17th century, the landed estate of Wà Âochy was acquired by Andrzej Leszczyà Âski, the Grand Chancellor of the Crown and the primate of Poland, who built there his manor house around 1650. In 1671, it was used as a hideout by Ulrich von Werdum, one of the organisers of a magnate opposition, attempting to nullify the election of Michaà  Korybut Wià Âniowiecki as the king of Poland and Grand Duke of Lithuania. In 1794, the area was also used by Frederick William II, the king of Prussia and Elector of Brandenburg, as his headquarters during the siege of Warsaw. The manor, as well as the village of Witki, were burned down by the Swedish army in 1656, during the Second Northern War, and its area eventually became part of Wà Âochy. The nearby Stojarty was also recorded for the last time in the 17th century. In 1794, the area was also used by Frederick William II, the king of Prussia and Elector of Brandenburg, as his headquarters during the siege of Warsaw.
In 1795, the estate of WÃ Âochy was acquired by count Tadeusz Antoni Mostowski, a politician and statesman, who later would become the minister of interior of the Duchy of Warsaw, and the president of the Government Committee of the Interior of the Kingdom of Poland. Around 1800, he founded his residence there and developed a park around it, the later being designed by A. Szubert. In 1842, they were redeveloped as a neoclassical palace and an English landscape garden, respectively. The later was redesigned by an English gardener F. James. The estate was acquired in 1844 by entrepreneur Andrzej Koelichen. The residence was again rebuilt in 1859, with a design by architect Aleksander Zabienowski, and became known as Koelichen Palace. The palace and the garden remained the property of the Koelichen family until 1939.
In 1928, as the nearby area developed into a residential neighbourhood with villa houses, the garden around the Koelichen Palace was opened to the public as a recreational urban space, known as the Combatants Park. The urban development was designed by Franciszek Krzywda-Polkowski and Mià Âosà Âaw Kotyà Âski. From 1933, the Koelichen Palace housed a chapel of the local Lutheran Evangelica community, until its new temple, the Church of the Epiphany was opened. In 1931, the community had around 1,000 members. In 1936, a library owned by the Property Owners Association was opened in the palace.
On 16 September 1944, while the area was under the German occupation during the Second World War, the authorities rounded up around 4,500 men, mainly from Wà Âochy, with their ages ranging between 16 and 50, or, according to some sources, 55. This constituted almost the entire working-age male population of the town. They were rounded up in the Combatants Park, from where they were taken to the camp in Pruszków. The majority were then sent to other concentration camps to perform forced labour. Around 3,500 were taken by train, while the rest were forced to walk. It is estimated that up to half of the people forcibly taken from the town in August and September died as a result. On 17 January 1945, Wà Âochy and OkÃÂcie were liberated from the occupation by the Polish People's Army.
The palace was renovated and restored after the end of the Second World War. The library was reopened in the palace in 1947, it begun being operated by the local municipal government.
Between 1999 and 2000, the park underwent a thorough renovation, with instalation of new lamps and new sidewalks being laid. Between 2007 and 2008, the park was expanded to encompass the entirety of the area between Obroà Âców Pokoju, Cianista, à Âwierszcza, Chroà Âcickiego, and à Âuki Wielkie Streets. In 2010, a park gate was built at Chroà Âcickiego Street, next to the palace. It was designed to recemble another, historic gate in the park, located at intersection of Cienista, Obroà Âców Pokoju, and Zdobnicza Street, which dates to the 18th century.
The Combatans Park is located between Obroà Âców Pokoju, Cianista, à Âwierszcza, Chroà Âcickiego, and à Âuki Wielkie Streets, and has an area of 5.06 ha (1250.353 acres). Majority of its land is covered by woodland. It has a few individual trees aged above 100 years, including: a small-leaved lime (around 250 years), a London plane (around 130 years), a field maple (around 130 years), two European black pines (around 130 years), and an American tulip tree (around 110 years). They have status of natural monuments, with another European black pine and small-leaved lime additionally holding it.
In the south, the park also includes the Koelichen Palace, a historic neoclassical palace dating to 1859. Placed near Chroà Âcickiego Street, it currently houses a public library. Additionally, the park also features a portion of historic 18th-century fence, including a gate at the intersection of Cienista, Obroà Âców Pokoju, and Zdobnicza Street, as well as numerous benches dating to the interwar period. Furthermore, the park includes three memorial plaques, as well as a Christian cross, dedicated: people killed in, and deported from Wà Âochy during the German occupation in the Second World War, people rounded up by German officers in the park on 16 September 1944, from where they were send to concentration camps, and people held, tortured, and killed in the People's Commissariat for Internal Affairs (NKDV) headquarters complex in Wà Âochy in 1945.
To the north, it borders another park centered around the Goat Pond with an area of 2.2 ha (5.44 acres). The pond itself has an area of 2.0643 ha (51009.96 acres).