A large religious complex was constructed at some point in the later 1st century AD, comprising a square-shaped temple enclosure c.1ha. in area, defined by a ditch (with an east-facing entrance) that is almost certainly late Iron Age in origin, with a double portico (with triple walls) around the outside and with a temple, comprising cella and ambulatory (14m in width), in the south-east corner of the corner. The Roman portico itself was set within a larger walled enclosure or temenos (c.2.65ha. in area), which abutted another large (c.4ha.) walled area to the east (see MCC7043 for both), to the north of the theatre (MCC2831) and north of the site of Cunobelin's farmstead (MCC7044).

Large Roman building in Insula 15, within a walled enclosure, interpreted as a possible Mithraeum (now discounted) or waterworks, situated in Castle Park and exposed during excavations in 1852/3, 1928 and 1954.

Excavation of the theatre uncovered four pits below the earliest phase, all of which had become completely silted up and sealed by a thick turf line before the erection of the earliest Roman building on the site.

Observations of contractors trenches dug for strip foundations was maintained during redevelopment of the two courtyard areas of St Helena's School.

A large Roman altar of sandstone found in excavtions for a sewer in Balkerne Lane just outside the SW angle of the town wall, c.6ft below the surface.

Roman tile-built drain to the south of the precinct wall of the Temple of Claudius (MCC1544), recorded in 1964 and 2006.

Romano-Celtic Temple precinct, situated on the south bank of the River Colne near to Sheepen.

Roman cremation burial, may be associated with the Roman temple-tomb, recorded by excavation in 2005.

Roman cremation burial, may be associated with the Roman temple-tomb, recorded by excavation in 2005.

Roman cremation burial, may be associated with the Roman temple-tomb, recorded by excavation in 2005.