Early post-medieval building evidenced by sleeper wall, internal clay floor, and external gravel yard, recorded during excavations in 1989-90.

12th century or earlier origin, with Roman walls for foundations, demolished in 1955.

11th century Augustinian Priory of St Botolph, located on the south-facing slope of a small valley outside the town's south (-east) gateway. It was preceded by an earlier church, which was served by a community of secular canons who chose to adopt the Rule of St Augustine. The church was refounded during the late 1090s as a house of Augustinian canons and was the first such foundation in the country. The priory church, built in the 12th century (and presumably finished by the time of its dedication in 1177) survives above ground, and there are also below-ground remains of cloistral buildings. The west front contains the traces of the earliest major round window in England, c.1150. The extent of the precinct has not been accurately established.

The east end of the church of the Crouched Friars was defined during a watching brief and excavation in advance of redevelopment at 38-42 Crouch Street, Colchester, on the site of the former Crouched Friars friary. The investigations demonstrated that Colchester Building 181, excavated to the west of this site in 1988 (ECC380), is part of the west end and cloisters of the same church. The central tower and cruciform plan could be early medieval, and it is presumed that this church is contemporary with the first documentary reference to the presence of the Crouched Friars here in AD 1251 (although there is no archaeological evidence to directly support this contention).

Group of pits and post-holes (some of which were unexcavated, and all only partially defined) defined by trial-trenched evaluation (Trenches 3 and 4) in 2010-11 at the Garrison Officers Club, outside of the abbey church but several cutting the robber (foundation) trench of the church (MCC3062).

Bourne Mill, a late Elizabethan building built in 1591, probably as a fishing lodge.

C12 nave with apsidal chancel, extended in the C13; C15 south porch (rebuilt in 1910-11).

Possibly pre-Norman in origin.

Areas of gravel defined during a watching brief and excavation in advance of redevelopment at 38-42 Crouch Street, Colchester, on the site of the (later) medieval Crouched Friars friary, were interepreted as the remains of a minor Roman road or street, aligned NE to SW across the site and heading towards the Balkerne Gate. The known extent of this metalling suggests a street c.4m in width. It should be noted, however, that areas of thin gravel surfaces were recorded during the excavation of medieval burials on the adjacent site (to the west) at number 42, Crouch Street, Colchester, excavated in 1988 (CAR 9, 248). Finds of early Roman, 1st-early 2nd century pottery, from a narrow gravel filled trench on its south side, indicate that the street was laid out in the early Roman period.

Roman and later features in Castle Park, recorded in 1983.