your loyalty to Her Majesty and to the beautiful County of Northumberland." 1953 External links National Trust Seaton Delaval Hall SeatonDelaval.org.uk SeatonDelaval.org Photos of Seaton Delaval Hall Houses completed in 1728 Country houses in Northumberland John Vanbrugh buildings English Baroque architecture Grade I listed buildings in Northumberland National Trust properties in Northumberland Historic house museums in Northumberland Gardens in Northumberland 1728 establishments in England Grade I listed houses Grade II* listed parks and gardens in Northumberland