(The images are clickable)  
  
During the 1985 excavation of the Soprintendenza archeologica, Maria Iride Pasquali excavated a room, built in the first half of the second century AD, with a later mosaic floor (photo), dated to 180-200 AD.  
 

In 1982, Friedrich Rakob and the German institute excavated a short wall beneath the apse of the church with a painting dated to the middle of the second century. 

Also the foundation wall excavated in 1998 close to the baptistery should belong to the pre-insula phase, that is to the second century AD. 

Perhaps also a great foundation wall found in 1982 beneath the sacristy belongs to this period. 

It is not easy to understand the exact ground level in the second century. Only in the mosaic room whe have a floor, which belongs to a late second century reconstruction. The excavated part of the short wall beneath the apse is on the same level, but it carries a detail of a painting which usually is found high above the ground, and the floor has not been found or excavated. The foundation wall close to the baptistery belongs to a slightly higher ground level. This means that the ground was not even and that we are not yet able to reconstruct the levels of the area before the great insula was built.   
  
We know very little of these second century buildings. It is risky to say anything about their shape and the function. All we know is that they were built close to the Ara Pacis. The known second century levels seem to indicate that the ground was higher to the west  - as it still is, by the way.