A Maltese treasure! Hidden wall painting from the Knights era confirmed as Neptune holding a trident
It was first found by accident back in 2021.
A painting discovered behind a blocked arch at the Gran Salon within the National Museum of Archaeology in Valletta has been confirmed as an image of Neptune, the Roman god of the sea, holding a trident in his hand.
The painting was first discovered in 2021 during the extensive conservation project underway at the Gran Salon.

Heritage Malta
The painting of Neptune stands inside what used to be a recessed arch with a fireplace, that was blocked and redecorated. While removing the pointing of the blocked-off access, the conservators witnessed decorative elements completely different from the current decorative scheme of the Gran Salon and a small opening was made and revealed details of a trident.
Following discussions of the findings with several professionals, the conservation team and Heritage Malta experts, with the approval of the Superintendence of Cultural Heritage, continued to meticulously remove stones blocking the archway to reveal the possible late 17th, early 18th century painting of Neptune.
He is seated in the centre of a large seashell, resting his left hand on a jar with flowing water whilst holding the trident in his right hand.
Neptune is depicted in a green colour, possibly to imitate the bronze statues. As part of the decorative scheme there are also some architectural features among other shells and fish.

Heritage Malta
To date, this is the only surviving element of the original decorative scheme of the Gran Salon, preceding the early 19th century redecoration of this important ceremonial space.
The Gran Salon is a majestic hall and one of the most captivating features of the Auberge de Provence which houses the National Museum of Archaeology.
The Knight’s period building was probably fully decorated, however the original decorations were removed or covered during the British Period.