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Portuguese architect Gonçalo Sousa Byrne won a competition for the Lisbon Harbor Control Tower in Lisbon, Portugal, completed in 2001. Clad in red, copper sheets, the nine-story tower leans slightly over the water on its man-made cape. The combination of form and material conspire to create a unique object, its silhouette a striking outline against the city behind it and the copper's patina varying due to the inclination of the surfaces.

Lisbon Harbor Control Tower.Lisbon., Portugal