Nestled in the heart of Portugal's former capital, this magnificent Romanesque structure is a must-see for history buffs. With its fortress-like façade, the cathedral exudes an aura of the medieval period, complete with crenellated towers and sturdy walls. Constructed in the 12th century, it has witnessed numerous historical events and has been adapted through various architectural styles over the centuries. Inside, delicate Gothic chapels and colourful azulejos add unexpected flair. Don't miss the intricate wood carvings of the altar and the captivating baroque organ, which when played, transforms the ancient space with its ethereal music.