San Teodoro is a 6th-century church in Rome. It was dedicated to Theodore of Amasea and given to the Orthodox community of Rome by Pope John Paul II in 2004. It and is located on an ancient road between the Roman Forum and Forum Boarium, along the north-western foot of the Palatine Hill.
However, there is no definitive evidence of the church's existence before the 9th century. As the dedication to an eastern saint suggests, this places it in a period of strong Byzantine influence in Rome. It was rebuilt under Pope Nicholas V, had its long-held titular church status suppressed by Pope Sixtus V, was renovated by Francesco Barberini in 1643, and rebuilt and given to the Society of the Sacred Heart of Jesus by Pope Clement XI and his architect Carlo Fontana in 1703-1705.
San Teodoro may first have been built as early as the 6th century in the ruins of the granaries of Agrippa. The unusual round shape suggests it may have been built into the ruined shell of a temple similar in construction to the well-preserved nymphaeum once identified as the Temple of Minerva Medica. An ancient pagan altar was placed in the atrium in front of the church, and an early Christian mosaic was found on the site. The apsis mosaic dates to the 6th century and shows Christ seated on an orb representing the heavens, flanked by Peter and Paul and by the two martyrs Theodore and Cleonicus.
At the back of the atrium, outside the church, is an ossuary with stacked skulls and bones, visible through a grille. The Capitoline Wolf was kept in this church until the 16th century.
References:The Clementinum is a historic complex of buildings in Prague. Until recently the complex hosted the National, University and Technical libraries, the City Library also being located nearby on Mariánské Náměstí. The Technical library and the Municipal library have moved to the Prague National Technical Library at Technická 6 since 2009. It is currently in use as the National Library of the Czech Republic.
Its history dates from the existence of a chapel dedicated to Saint Clement in the 11th century. A Dominican monastery was founded in the medieval period, which was transformed in 1556 to a Jesuit college. In 1622 the Jesuits transferred the library of Charles University to the Klementinum, and the college was merged with the University in 1654. The Jesuits remained until 1773, when the Klementinum was established as an observatory, library, and university by the Empress Maria Theresa of Austria.