Marylebone was originally an Ancient Parish formed to serve the manors (landholdings) of Lileston (in the west - which gives its name to modern Lisson Grove) and Tyburn in the east. The parish is likely to have been in place since at least the twelfth century and will have used the boundaries of the pre-existing manors. The boundaries of the parish were consistent from the late twelfth century to the creation of the Metropolitan Borough which succeeded it.