The church's remains were preserved by the intervention of Trinity House in 1810, since the towers had long been important as a landmark for shipping: preservation was achieved through the first effective effort to protect the cliff on which the church then stood from further erosion. Some materials from the structure were incorporated into a replacement church, also dedicated to St Mary, built at Hillborough in the same parish. Much of the rest was used for the building of a new harbour wall at Margate, known as Margate Pier. Other, surviving remnants include fragments of a high cross of stone that once stood inside the church, and two stone columns from a triple arch between the nave and chancel: the columns formed part of the original church and were still in place when demolition began. The cross fragments and columns are now kept in Canterbury Cathedral, and are among features that have led to the church being described as an exemplar of Anglo-Saxon church architecture and sculpture.