The Fortaleza de Nossa Senhora da Assunção is a historic fortress located in Asunción, the capital of Paraguay. Built in the late 16th century, it was constructed by the Spanish to protect the area from invasions and to establish control over the region. The fortress features thick stone walls and a strategic position overlooking the Paraguay River. Today, the fortress is a significant cultural and historical site, attracting visitors interested in Paraguayan history and colonial architecture. It has been preserved as a national monument and serves as a reminder of the country's colonial past and military heritage.