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State government

As the capital of the homonymous state, the city is the seat of the state government. The Guanabara Palace (formerly known as Paço Isabel) is located in the Laranjeiras neighborhood, in the south zone, and is the official seat of the Rio de Janeiro executive power. Not to be confused with Palácio Laranjeiras, situated in the same neighborhood, which is the official residence of the governor of Rio de Janeiro.

The Legislative Assembly of Rio de Janeiro (ALERJ) is the state legislative body and is headquartered at Tiradentes Palace, where the Chamber of Deputies of Brazil previously functioned.

The Court of Justice of the State of Rio de Janeiro (TJRJ) is the highest body of the judiciary in the state. Its central court is located in downtown Rio de Janeiro, but, from 2013 to July 2018, some of the courts of this court were moved to Cidade Nova.