Štramberk Castle ruins have an unknown origin (according to an old tale, the site of its original planned location was on the opposite hill Kotouè, but that was prevented by dwarves from the cave Devil's hole). Apparently, it was made to protect country boundaries. According to the most recent information, the castle was built either by members of the aristocratic family, Benešovic, or more precisely, after 1200, by the princes of the Pøemyslide family. In the 13th century, the castle was owned by the knights of the Templar order (see T. J. Pešina, Prodromus Moraviographiae, 1663). After the abolition of the order in 1312, the castle came under the administration of the Czech king Jan Lucemburský and, between 1333 and 1346, it was owned by the Moravian margrave Karel, later King of Bohemia (Charles IV). From 1350 (since 1359 called castrum Strallenberg), it was 25 later owned by the Moravian margrave Jan Jindøich, the founder of the town; then in 1375 it was taken over by his son, the margrave Jošt Lucemburský. After 1380, the most important owners of the castle were members of the Moravian-Silesian branch of the family Benešovic, the lords of Kravaøe (until 1433). After 1533, the castle started to deteriorate. Its oldest illustration (from 1722) shows a two-palace structure with farm buildings and two prismatic ramparts. In 1783, the outer part of the castle collapsed and the masonry was used for building purposes. The original height of the N-E fortification in the inner part of the castle remained unchanged. Between 1901 and 1903, its cylindrical tower called „bergrit“ (height 40 m, 10 m in diameter) was covered with a roof and changed into a lookout designed by the famous Prague architect Kamil Hilbert. The outer ramparts were partly repaired and completed with two gates. A plaque designed by the sculptor František Juráò, was fitted into the fortification in memory of Adolf Hrstka M.D. (1864-1931), physician and former mayor of Štramberk and its indefatigable promoter. The gothic tower of the castle together with adjoining parts of the fortification (NKP = National cultural monument) generally known as Trúba (local expression for round timber) dominates the town. In 1994, it became its property.
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.