Rising dramatically from the Tagus riverfront in Lisbon, this monumental limestone and concrete structure commemorates the Portuguese Age of Discovery. Designed by architect Cottinelli Telmo and sculptor Leopoldo de Almeida, the 52-meter tower features a soaring geometric form crowned with ornamental detailing, anchored by a sweeping sculptural prow carved with numerous human figures representing explorers, navigators, and historical figures. The carved limestone relief cascades down the vessel-like base, creating a dynamic interplay of light and shadow across the pale stone. Its imposing scale and modernist abstraction transform historical narrative into monumental form, making it one of Portugal's most iconic twentieth-century public artworks and a symbol of national maritime heritage. Wikimedia Commons (CC BY-SA)