The structure is Saint Peter's Basilica, located in The Vatican City.
Explanation:
Saint Peter's Basilica is a Catholic church in the style of Renaissance architecture, and it's the most renowned work of Renaissance architecture, which brought back elements from the ancient Greek and Roman architecture and material culture. This style focused on symmetry, proportion, geometry and the regularity of parts. They used arrangements of columns and pilasters, also arches, hemispherical domes, and niches to replace the more complex systems and irregular profiles of medieval buildings. Saint Peter's Basilica has a floor plant in the shape of a Roman cross, with a grand Dome right above the high altar. The building uses vertical and horizontal lines to define it´s shape, with long horizontal lines being crossed by parallel columns that cover the entire height of the building.
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