Within the Gardens themselves are the remains of the foundations of the Roman amphitheatre, which was built around the year 70 AD. The elliptical wall around the theatre is in blocks of limestone, and would have served as the base for the ramped seating inside. In size, the structure will not have been smaller than the Verona Arena, something which demonstrates the exceptional economic wealth of Padua at the time.
The theatre was known as an ‘arena’ because of the particularly fine sand (harena) which was sprinkled across the ground before gladiatorial combats.
In the Middle Ages, the theatre was demolished, becoming a quarry for building stones. Later, the remains were purchased by the rich Scrovegni family, who had their family palazzo built on the site, along with the famous Chapel that still bears their name. In 1801 the palazzo was itself demolished, whilst the Chapel was acquired by Padua City Council in order to preserve the famous Giotto frescoes.
At the main entrance to the Gardens stands a marble monument to Giuseppe Garibaldi which is the work of Ambrogio Borghi.
Opposite (on the other side of the road) is Palazzo Cavalli, which is now home to the Institute of Geology and the Geological Museum, while a little further on, towards the city centre, stands the Museum of Palazzo Zuckermann.