sentences:  Archeological excavations in the 1960s uncovered part of the castle wall and it is from these excavations that we get most of what we know about the castle today.The parish church, dedicated to St Mary is the oldest building in Aylesbury.Cruciform in design, it follows a common layout of English churches, the tower in the centre, the nave with aisles in the west, leading to the chancel in the east, and chapels in the north and south transepts.