The first mention of a church in Konstanz dedicated to the Virgin Mary was in 615. Documentary confirmation of the Episcopal church is dated to the mid 8th century. There is clear evidence indicating that it was located on the Cathedral Hill, where a late Romanesque fortification with an adjoining civilian settlement had been established. In 780, the church was mentioned in a confirmation of a contract by Charlemagne.
St. Maurice’s Rotunda (Holy Sepulchre) was built in 940 on orders of Bishop Konrad (934 - 975) who was canonized in 1123. In 1052, the cathedral collapsed. Its reconstruction took place under Bishop Rumold (1051 - 1069), with the eastern transept and three naves separated by 16 monoliths. The next 300 years saw the construction of one towers, then another, then a great fire destroyed one of the towers along with parts of the basilica as well as 96 other houses in the city. The south tower was completed in 1378.
From 1414 to 1418 the Council of Constance took place. The most important assembly of the Church during the Middle Ages, and the only one on German soil. Martin V, who had been elected Pope by the Conclave and thereby ending the schism dividing the Church, is enthroned in this Cathedral in 1417. In 1415 Jan Hus, because of his teachings, was condemned as a heretic by the Council who, at this time, was without a Pope. He was then delivered to the secular power who condemned him to death, tied him to a stake and publicly burnt him alive.
Between 1418 and 1525, the Cathedral was adapted to Gothic style by master craftsmen. In the period from 1526 to 1551, the Bishop left Konstanz because of the Reformation, and moved his See across the lake to the Martinsburg in Meersburg. The radical iconoclasm instigated by the reformer Huldrych Zwingli in nearby Zurich, caused the destruction of artwork in the Cathedral.
The subsequent centuries saw the addition of more paintings, wrought iron gates and sculptures, as well as the replacement and repair of destroyed items. Of note is the replacement of the painted Romanesque wooden ceiling by brick vaulting in 1637.
In 1821, Konstanz's bishopric, the largest in Germany, was dissolved and, in 1827, moved to Freiburg in the Breisgau. It had served the people around Lake Constance (Bodensee) for 1200 years, and survived almost 100 bishops. General restoration work took place on the Cathedral from 1844 to 1860; the tower was raised in neo-Gothic architectural style.
In 1955 Pope Pius XII raised the Cathedral to a papal Basilica Minor. A restoration program of the Cathedral’s interior as well as exterior was started in 1962 and is expected to be completed by 2010. In 1966, twelve new bells were cast and hung in the center tower and the ridge turret, a present from the state of Baden-Württemberg.References:
The Palazzo Colonna is a palatial block of buildings built in part over ruins of an old Roman Serapeum, and has belonged to the prestigious Colonna family for over twenty generations.
The first part of the palace dates from the 13th century, and tradition holds that the building hosted Dante in his visit to Rome. The first documentary mention notes that the property hosted Cardinal Giovanni and Giacomo Colonna in the 13th century. It was also home to Cardinal Oddone Colonna before he ascended to the papacy as Martin V (1417–1431).
With his passing, the palace was sacked during feuds, and the main property passed into the hands of the Della Rovere family. It returned to the Colonna family when Marcantonio I Colonna married Lucrezia Gara Franciotti Della Rovere, the niece of pope Julius II. The Colonna"s alliance to the Habsburg power, likely protected the palace from looting during the Sack of Rome (1527).
Starting with Filippo Colonna (1578–1639) many changes have refurbished and create a unitary complex around a central garden. Architects including Girolamo Rainaldi and Paolo Marucelli labored on specific projects. Only in the 17th and 18th centuries were the main facades completed. Much of this design was completed by Antonio del Grande (including the grand gallery), and Girolamo Fontana (decoration of gallery). In the 18th century, the long low facade designed by Nicola Michetti with later additions by Paolo Posi with taller corner blocks (facing Piazza Apostoli) was constructed recalls earlier structures resembling a fortification.
The main gallery (completed 1703) and the masterful Colonna art collection was acquired after 1650 by both the cardinal Girolamo I Colonna and his nephew the Connestabile Lorenzo Onofrio Colonna and includes works by Lorenzo Monaco, Domenico Ghirlandaio, Palma the Elder, Salviati, Bronzino, Tintoretto, Pietro da Cortona, Annibale Carracci (painting of The Beaneater), Guercino, Francesco Albani, Muziano and Guido Reni. Ceiling frescoes by Filippo Gherardi, Giovanni Coli, Sebastiano Ricci, and Giuseppe Bartolomeo Chiari celebrate the role of Marcantonio II Colonna in the battle of Lepanto (1571). The gallery is open to the public on Saturday mornings.
The older wing of the complex known as the Princess Isabelle"s apartments, but once housing Martin V"s library and palace, contains frescoes by Pinturicchio, Antonio Tempesta, Crescenzio Onofri, Giacinto Gimignani, and Carlo Cesi. It contains a collection of landscapes and genre scenes by painters like Gaspard Dughet, Caspar Van Wittel (Vanvitelli), and Jan Brueghel the Elder.
Along with the possessions of the Doria-Pamphilij and Pallavacini-Rospigliosi families, this is one of the largest private art collections in Rome.