Subsequent excavations in 1899 revealed a cache of 397 gold solidi hidden under the floor of a small room in another part of the complex.

This second hoard primarily consisted of coins minted during the rule of Anthemius, and was likely buried before or during the Siege of Rome in 472.

The most popular theory, first published by Esther Boise Van Deman in 1909, is that the site served as a residential building for Western Roman emperors during the 5th century.

[3] The study of the coins, their variants documented in the Roman Imperial Coinage, with additional contemporary hoards and die studies in Poland, Egypt, and Öland, Sweden provided insight into Anthemius' ability and limitations to pay mercenaries under his treasury, up until his demise in 11 July 472, with Sack of Rome under Ricimer.

[1] Upon its discovery, it caught the attention of the British press in two days, through The Times, where speculation of an Englishman in medieval Rome brought much public interest.