The Hallwyl Palace was built 1893-1898 to the design of Isak Gustaf Clason for Count Walther von Hallwyl and his wife Wilhelmina. It was created to accommodate the office of the count and the extensive art collection of the countess. While the exterior of the building and the court is historical in style — borrowing architectonic elements from medieval prototypes and Renaissance Venice — it was technically utterly modern on its completion — including electricity, central heating, telephones, and bathrooms, while the elevator was a later addition.
The countess collected her artworks during her worldwide journeys in order to found a museum, and, consequently, the palace was donated to the Swedish State in 1920, a decade before her death. The collection encompasses some 50,000 objects, and the museum is still open to the public.
References:The Basilica of Santa Maria in Trastevere is one of the oldest churches of Rome. The basic floor plan and wall structure of the church date back to the 340s, and much of the structure to 1140-43. The first sanctuary was built in 221 and 227 by Pope Callixtus I and later completed by Pope Julius I.
The inscription on the episcopal throne states that this is the first church in Rome dedicated to Mary, mother of Jesus, although some claim that privilege belongs to the Basilica di Santa Maria Maggiore. A Christian house-church was founded here about 220 by Pope Saint Callixtus I (217-222) on the site of the Taberna meritoria, a refuge for retired soldiers. The area was made available for Christian use by Emperor Alexander Severus when he settled a dispute between the Christians and tavern-keepers.
The church underwent two restorations in the fifth and eighth centuries and in 1140-43 it was re-erected on its old foundations under Pope Innocent II.