The Gannarve grave is outlined by large standing stones, forming the shape of a ship. It has been built at the end of the Bronze Age, about 1100 – 500 B.C. The grave is 29 metres long and 5 metres wide. It is only one of about 350 boat-shaped graves on the island. In most cases, only one burial has been uncovered in each grave. When these people were buried, it was a custom to cremate the dead on a pyre. After cremation, the bones were crushed and washed before they were placed in an urn.
There were once two boat-shaped graves here at Gannarve. One of them fell victim to the plough long ago. The existing grave was almost destroyed in the same way. Only the stem stones remained when archaeologists started excavating the monument in 1959. The excavation uncovered soil marks of all the removed stones beneath the peat. Consequently, the reconstruction of the entire grave was not too diﬃcult.
There were plenty of large stones lying right next to the grave, and it is quite possible that several of the stones used once actually belonged to the original grave.
Sirmione castle was built near the end of the 12th century as part of a defensive network surrounding Verona. The castle was maintained and extended first as part of the Veronese protection against their rivals in Milan and later under the control of the Venetian inland empire. The massive fortress is totally surrounded by water and has an inner porch which houses a Roman and Medieval lapidary. From the drawbridge, a staircase leads to the walkways above the walls, providing a marvellous view of the harbour that once sheltered the Scaliger fleet. The doors were fitted with a variety of locking systems, including a drawbridge for horses, carriages and pedestrians, a metal grate and, more recently, double hinged doors. Venice conquered Sirmione in 1405, immediately adopting provisions to render the fortress even more secure, fortifying its outer walls and widening the harbour.
Thanks to its strategical geographical location as a border outpost, Sirmione became a crucial defence and control garrison for the ruling nobles, retaining this function until the 16th century, when its role was taken up by Peschiera del Garda.