This article presents the results of the 2008 excavation in the ancient theatre of Sparta conducted by the British School at Athens and the Ephorate of Antiquities of Laconia. Focused on the west side of the cavea, work aimed to locate the southern edge of the Late Antique settlement between the theatre and the sanctuary of Athena Chalkioikos; to establish the northern limits of the Late Antique settlement over the former orchestra; and to establish a more precise ceramic characterisation and chronology for the Early–Middle Byzantine period in Sparta. The area between settlement clusters on the acropolis and over the former orchestra was essentially open, with just a Byzantine terrace wall and path recorded. In the north-west part of the former cavea, a tomb built in the late eighth or early ninth century AD was used at least until the late thirteenth century for the burial of c. 29 individuals. This article presents the first results of a bioarchaeological study of the human remains, and studies of Byzantine pottery from the tomb interior and from the backfill of the pit in which the tomb was built (the latter including a notable quantity of Early Byzantine domestic ware). The 2008 findings are set in the larger context of research on post-antique phases in the theatre (drawing on the British School at Athens Archive) and on the material culture and urban topography of Byzantine Sparta. Almost all excavated contexts contained residual material of all periods. The article concludes with short catalogues of material which pre-dates the construction of the theatre and of inscriptions of all periods.