Giorgio Grongnet de Vasse (1774-1862) was a renowned 19th century Maltese architect. He designed the church in Mosta, which has one of the largest unsupported domes in the world, having a 40 metre diameter.

In 1854, following the lead of Bibischok and his own extensive research he suggested that Malta was a remnant of Atlantis. However, it was not until the following century that the idea was given any serious attention. De Vasse placed the island of Atlantis in the Libyan Gulf of Syrtis. He also produced a map that denoted the western Mediterranean as the Ancient Atlantic Sea (Mare Atlantico Antico).