A Roman masonry? building discovered during excavations at St Mary's Rectory in 1967 (ECC663). The building was evidenced by walls which had been almost completely robbed-out. No superstructure survived and only a few stretches of foundation were preserved. The foundations had been built of gravel and mortar and were relatively shallow, having been sunk only two and a half feet below the contemporary surface. It is likely therefore that the superstructure was built of wattle and daub. The floors were made of trampled clay. Not enough of the building survived for its plan to be restored or it use to be determined. The building was on a different alignment to the earlier pre-Boudican buildings and was located on the east side of Insula 25a.<1>