Sé do Porto, also known as the Porto Cathedral, is a prominent Romanesque church located in the historic center of Porto, Portugal. Construction began in the 12th century, making it one of the city's oldest monuments. The cathedral features a mix of architectural styles, including Gothic and Baroque elements, and is known for its impressive façade and stunning views of the Douro River. Inside, visitors can explore the beautiful chapels, intricate altarpieces, and a remarkable cloister adorned with azulejos, traditional Portuguese tiles. The cathedral is not only a place of worship but also a significant cultural landmark, attracting tourists and pilgrims alike.