The Pantheon is a magnificent ancient temple in Rome that was later converted into the church of Santa Maria ad Martyres. Dating from 125 AD, this is the most complete ancient building in Rome and one of the city’s most spectacular sights.
Until the 20th century, the Pantheon was the largest concrete structure in the world. Michelangelo studied its great dome before starting work on the dome of St. Peter’s Basilica.
The Pantheon was dedicated to pan theos, “all the gods.” When it became a church, it was dedicated to the Virgin Mary and all the martyrs.
The Pantheon is the burial place of several important Italians (including the artist Raphael), and it remains an active church. It is a major tourist destination and a popular place for weddings.
The Pantheon was originally built in 27-25 BC by the magistrate Marcus Agrippa (his name appears on the inscription outside), to commemorate the victory of Actium over Antony and Cleopatra. This original temple burned down in 80 AD.
The Pantheon was completely reconstructed in 125 AD by Hadrian, a cosmopolitan emperor who had traveled widely in the East. The second temple was dedicated to every known god, from which the Pantheon gets its name. Hadrian himself is credited with the basic plan, an architectural design that was unique for the time.
The Pantheon was maintained and restored by the emperors Septimus Severus (193-211) and Caracalla (211-17). During its two centuries as a functioning temple, statues of gods filled the niches. Animals were sacrificed and burned in the center; the smoke escaped through the only means of light, the oculus.
After Christianity replaced paganism in Rome, the Pantheon was abandoned for a time. Public pagan worship was prohibited in 346 and most pagan temples were closed in 356. Fortunately, a decree of 408 ordered that temples were to be put to new use; thus some have been preserved and were used as secular buildings.
The Pantheon remained unused until the Byzantine emperor Phocas (602-10) gave it to Pope Boniface IV (608-15). In 609 AD, the Pantheon was consecrated as a Christian church. It was the first pagan temple in Rome to be Christianized, although the practice had been common in the East since the 4th century. The church was dedicated to the Virgin Mary and all the martyrs, thus continuing the tradition of a “catch-all” place of worship.
As part of the consecration in 609, an altar was placed in the main apse opposite the entrance, with an icon of the Virgin and Child placed above it. Legend has it that Pope Boniface transferred “cartloads” of martyrs’ relics to the newly consecrated church, but this is unlikely. At that time, the presence of human remains inside a city was an Eastern practice frowned upon in Rome. The earliest documented transfer of relics into Rome is in the 640s (by popes of Eastern origin) but the practice did not really become accepted in Rome until the 8th century. Future excavations may reveal whether the legend is based in fact or not.
In 667, the Pantheon was stripped of its golden roof tiles and looted of anything of value, but the building was partially restored by Pope Benedict II (684-85). It was subsequently robbed and restored again several times.
In the 16th century, Michelangelo came to the Pantheon to study its dome before he began work on the dome of St. Peter’s (whose dome is 2 feet smaller), and the Pantheon’s roof was stripped of bronze for use in Bernini’s baldacchino in St. Peter’s. In 1563, the bronze doors were restored.
Among the many buildings influenced by the Pantheon’s design are the British Museum Reading Room, Thomas Jefferson’s Rotunda at the University of Virginia, Low Library at Columbia University and the State Library of Victoria in Melbourne, Australia. The “Historic Centre of Rome,” with specific mention of the Pantheon, was designated a World Heritage Site in 1980.



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