Vartiovuori observatory is the former observatory of the Royal Academy of Turku. Building was completed 1819 and it was designed by German architect Carl Ludvig Engel. By its style, the neoclassical observatory is typical work of Engel and it has obvious similarities to Helsinki University Observatory and Pulkovo Observatory (in St. Petersburg, Russia) designed also by him. Building is located on top of the Vartiovuori hill, close to the cathedral and Aura river and it's well visible from many places in city center.
The Academy moved to Helsinki after the Fire and got a new observatory there few years later. Instruments were moved to Helsinki and finally Vartiovuori Observatory became defunct 1834. At 1836 Åbo Navigationsskola (Maritime School) moved into empty observatory building and stayed there until 1967. Between 1986 and 1998 building was a maritime museum and during the repair of the Turku Art Museum 1999–2005, the changing exhibitions were placed in observatory. Currently and also in the picture, a flag of the foundation Stiftelsen för Åbo Akademi flies over the building.
The observatory and several wooden houses (current Luostarinmäki Handicrafts Museum) on the hill were saved from the Great Fire of Turku 1827.References:
The Baths of Caracalla were the second largest Roman public baths, or thermae, in Rome. It was built between AD 212 and 217, during the reigns of Septimius Severus and Caracalla. They would have had to install over 2,000t of material every day for six years in order to complete it in this time.
The baths remained in use until the 6th century when the complex was taken by the Ostrogoths during the Gothic War, at which time the hydraulic installations were destroyed. The bath was free and open to the public. The earthquake of 847 destroyed much of the building, along with many other Roman structures.
The building was heated by a hypocaust, a system of burning coal and wood underneath the ground to heat water provided by a dedicated aqueduct. It was in use up to the 19th century. The Aqua Antoniniana aqueduct, a branch of the earlier Aqua Marcia, by Caracalla was specifically built to serve the baths. It was most likely reconstructed by Garbrecht and Manderscheid to its current place.
In the 19th and early 20th century, the design of the baths was used as the inspiration for several modern structures, including St George's Hall in Liverpool and the original Pennsylvania Station in New York City. At the 1960 Summer Olympics, the venue hosted the gymnastics events.