The Congreso de los Diputados is the lower house of the Cortes Generales, Spain's national parliament. It is located in Madrid and consists of 350 members, known as deputies, who are elected every four years. The main responsibilities of the Congreso include debating and approving laws, as well as overseeing the government. The Congreso de los Diputados plays a crucial role in the legislative process, as it must approve any proposed laws before they can be enacted. Additionally, it has the power to question and hold the government accountable, ensuring that it acts in the best interest of the Spanish people.