The Romans settled on the location of the present town on a strip of terrace cut with channels. Near one of them, orthogonal trenches seem to indicate the presence of a first building made of wood and earth. These trenches were filled in and covered with silt from overflows which show that there were frequent floods which perhaps destroyed the first development of the site. On this alluvial soil, new trenches of walls, always of light materials, were dug following the same orthogonal plan. The building seems to have been used for military purposes as it was inside the supposed area of the camp known as that of Tiberius. Findings from the trenches and the floors and the hearths that have remained date this second occupation of the site from the Claudian epoch (41 to 54 AD). 

After 80 AD, a thick layer of silt, clay and gravel, carried onto the remains of these first developments were used to level, improve and prepare the land for the installation of the legionary camp of the legio VIII Augusta.
A four metre wide antique street has been brought to light. It was the first road parallel to the via sagularis (road encircling the interior of the camp), of which the known trace is found at about thirty metres. On the side of the street there is a building with a doorway. Covering more that 220 m 2  and including more that fifteen identified rooms this building is so large that it continues outside the present courtyard. Some of the rooms have hearths and floors made of mortar or of terrazzo (mortar made from tiles). Built at the end of the 1st century AD, it was completely refurbished at a date to be determined, as is its function. Nonetheless the presence of a batch of metallic pieces linked to cavalry equipment has been recorded. Did this building house the cavalry of the legion (workshop, barracks …)?

It was not until the 11th century that building materials from the refurbishment of the Roman building were used. The half-buried foundations of two houses followed the Roman plan. The medieval development seem thus to have followed the general plan of this orthogonal cadastre. Among these remains, have been found, apart from two houses and several ditches, three latrines and two water wells, all containing important remains: pottery, wooden recipients, cooking pots, tiles, small everyday life objects, animal bones many of which show traces of butchering. 

A stone and brick cellar, two brick latrines and a separation wall, all orientated according to the Roman cadastre, constitute the remains dating from the 15th or early 16th centuries. After several renovations, the last one shortly after 1850, the house above the cellar was completely levelled to make place for the construction of the present building which housed the "Stadtbauamt" of the Town of Strasbourg, i.e. the municipal services of the German administration.