Reculver occupies a coastal site in Kent where Roman military remains stand beside the towers of a medieval church. The two monuments belong to different periods, although their histories became physically connected through reuse of the same ground and building materials. In Roman times the position overlooked the northern entrance to the Wantsum Channel, which separated the Isle of Thanet from mainland Kent. The modern coastline, shaped by erosion and the disappearance of that navigable channel, gives a very different impression of the original setting.

The Roman fort, known as Regulbium, was established in the early third century AD. Its substantial enclosing walls protected a military installation controlling an important maritime approach. Reculver later formed part of the defensive network conventionally called the Saxon Shore, although the purposes and development of that system were more complex than its name alone suggests. The fort linked coastal observation and movement by water with Roman authority on land. Surviving masonry provides evidence of its scale, but much of the original enclosure has been lost.

An Anglo-Saxon monastery was founded at Reculver in 669, after the end of Roman government in Britain. Its church occupied part of the former fort, demonstrating how a prominent abandoned military place could become a religious centre. The church subsequently served a parish community and underwent medieval alteration. Its distinctive twin towers date from the medieval period, not the Roman occupation. Reused Roman stone and brick nevertheless connected the new religious buildings materially with the earlier enclosure in which they stood.

Coastal erosion gradually threatened both settlement and church. Most of the church was demolished in 1809, while the towers were retained because of their importance as a navigational landmark. Trinity House became involved in their preservation and the protection of the shoreline. This practical maritime role gave the towers a further purpose after the principal church building had gone. The resulting monument is therefore neither a complete medieval church nor a wholly accidental ruin, but a surviving structure deliberately maintained within an eroding coastal landscape.

Today the Roman walls, church foundations and towers need to be read together without collapsing their chronology. The sea has removed evidence as well as creating the dramatic setting, while later protective works have helped determine what remains visible. Reculver illustrates repeated decisions about a strategically conspicuous place: imperial soldiers occupied it, Christian communities adapted it, parishioners worshipped there and maritime authorities preserved its silhouette. Its history is as much about changing coastlines and practical reuse as about the separate architectural achievements of Roman and medieval builders.