Three Crosses Square (Polish: Plac Trzech Krzyży [ˈplat͡s tʂɛx ˈkʂɨʐɨ]), also known as Triple Cross Square, is an urban square and a road junction in the central district of Warsaw, Poland. It lies on the Royal Route and links Nowy Świat (New World) Street, to the north, with Ujazdów Avenue to the south.
Much of the square's area is devoted to a major thoroughfare.
The Senate (Polish: Senat) is the upper house of the Polish parliament, the lower house being the Sejm. The history of the Polish Senate stretches back over 500 years; it was one of the first constituent bodies of a bicameral parliament in Europe and existed without hiatus until the final partition of the Polish state in 1795. The contemporary Senate is composed of 100 senators elected by a universal ballot and is headed by the Marshal of the Senate (Marszałek Senatu). The incumbent Marshal of the Senate is Małgorzata Kidawa-Błońska.
Following a brief period of existence under the Second Polish Republic, the Senate was again abolished by the authorities of the Polish People's Republic. It was not re-established until the collapse of the communist government and reinstatement of democracy in Poland in 1989. The Senate is based in Warsaw and is located in a building which forms part of the Sejm Complex on Wiejska Street, in close proximity to the Three Crosses Square and Ujazdów Castle.