The Ruins of St. Paul's, widely known as the Grand Arch, is Macau's most recognisable landmark. It is the surviving elaborate granite facade of the Church of St. Paul, originally constructed in the 17th century by Jesuit missionaries. Successive fires left only the magnificent front wall standing.

Adorned with intricate carvings blending Western religious motifs and Eastern artistic elements, the facade showcases a unique fusion of European and Chinese culture. Reliefs of the Virgin Mary, saints, biblical stories, as well as Chinese lions and inscriptions, reflect Macau's history as an early Sino-Western trading and cultural hub.

Located in the heart of old Macau, the site belongs to the UNESCO World Heritage Site. Crowded cobblestone lanes full of local snacks surround the monument. As a timeless symbol of Macau, the Ruins of St. Paul’s carries profound historical significance. It offers visitors a precious chance to appreciate splendid missionary architecture and trace the extraordinary cross-cultural history of this charming city.