Law and Justice is a national-conservative, Christian democratic and right-wing populist political party in Poland, a member of the Alliance of Conservatives and Reformists in Europe. With 221 seats in Polish Sejm and 66 in the Senate, PiS is currently the largest political party in the Polish parliament. The current twenty-five PiS MEPs sit in the European Conservatives and Reformists Group in the European Parliament.
The party was founded in 2001 by the Kaczyński twins, Lech and Jarosław as centrist and Christian democratic party. It was formed from part of the Solidarity Electoral Action, with the Christian democratic Centre Agreement forming the new party's core. The party won the 2005 election, while Lech Kaczyński won the presidency.