Pantheon
Apollodorus of Damascus · Rome, Italy · 128
The Pantheon is a marvel of Roman engineering, renowned for its massive unreinforced concrete dome, which remains the largest unsupported dome in the world. Its classical design features a traditional temple-front façade with a portico of large Corinthian columns, contrasting with the vast cylindrical rotunda behind. The oculus, an open circle at the dome's apex, is the sole source of natural light, illustrating advanced atmospheric control for its time. Originally built as a temple to all gods, the Pantheon was later consecrated as a Catholic church, Santa Maria ad Martyres, in the 7th century. This continuous use has contributed to its remarkable state of preservation. Its design profoundly influenced Western architecture, serving as a model for countless public buildings and churches for centuries.