Former observatory housed in medieval tower
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| La Specola - the medieval fortress tower that became the University's astronomical observatory |
Originally part of a 13th century castle known as Castelvecchio, just inside the ancient city walls, the tower became home to the University of Padua’s astronomical observatory in 1767, after which it was in continuous use until the late 1930s,
The observatory was conceived and designed by Giuseppe Toaldo, a significant figure in the evolution in particular of meteorological science during his lifetime.
Toaldo, who was also an ordained priest, was the university’s chair of astronomy and meteorology for 33 years until his death in Padua in 1797.
His notable achievements included being one of the first scientists to collect and log data and use it to predict weather patterns.
Drawing on his wealth of knowledge of meteorological phenomena, he also saved potentially hundreds of lives by persuading sceptical clergy to attach lightning conductors to the top of church bell towers, which were often struck during electrical storms.
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| Giuseppe Toaldo, a leading light in 18th century meteorology |
Working with the architect Domenico Cerato, Toaldo oversaw the creation of the astronomical observatory between 1767 and 1777.
The tower in which it was housed was built in the 13th-century by Padua’s tyrannical then-ruler, Ezzelino III da Romano, who used it as a dungeon where prisoners were tortured. It was raised further in height in the 14th century during a reconstruction by Francesco I da Carrara.
The tower contained a lower observatory, 16m (52ft) above ground level, and an upper observatory, at a height of 35m (115ft).
In the lower observatory, named the Sala Meridiana; noon was measured on the meridian line sunk in the floor. The upper observatory has large windows almost six metres high.
A plaque at the entrance carries an inscription by Toaldo that says: "This tower, which once led to infernal shadows now, under the auspices of the Venetians, opens the way to the stars".
The observatory was superseded by a new facility at Asiago, 75km (47 miles) north of Padua, in 1942. Since 1994, La Specola has been home to an astronomical museum. As well as displays outlining the history of astronomy in Padua and Europe from the 18th century, the museum offers the chance to see a superb collection of antique astronomical observation equipment, including English-made instruments from the 18th century, and telescopes from Germany and Austria.
Viewing the museum is by guided tour only. Visits take place on Saturdays, Sundays and public holidays, at 4pm from October to April or 6pm from May to September, by advance booking. Details can be found here











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