Before the restoration of the Derlon Hotel started, Maastricht's city archeologists undertook an extensive survey of the site. The Roman finds, from the 2nd, 3rd and 4th century, are considered that important that it was decided to conserve them and exhibit these to interested parties. The following can be seen in the cellar of Derlon Hotel: part of a 2nd and 3rd century square, a 3rd century well, part of a pre- Roman cobblestone road and sections of a wall and a gate dating from the 4th century.