The Palacio del Congreso (English: Palace of the Congress) is the meeting place of the two houses of the Congress, the House of Representatives and the Senate. The Palacio del Congreso is located at Plaza de la Republica in El Centro, San Luis.

The palace was built in 1756 by Spanish colonists in Prasia and has played a significant part in Prasian history, with the Congress meetings in the building since its formation.