The parish church of St Mary the Virgin in Walkern, Hertfordshire, dates from before the Norman Conquest and has been altered in the succeeding centuries.

There is an Anglo-Saxon sculpture in the south aisle over what was the original doorway to the church.

The cross-legged attitude in tomb sculpture was fashionable in the British Isles in the 13th century.

It has been suggested that the sculpture represents William de Lanvalei, lord of Walkern in the early 13th century, and one of the men designated as enforcers of Magna Carta.

[2] The parish is part of a united benefice with Ardeley, Benington, Cottered, and Throcking.