The Grange, a country house in South Mimms, served as a home for Queen Wilhelmina of the Netherlands during her exile during World War II, from 1940.

On 20 February 1944, a German air attack on South Mimms narrowly missed her, killing two of her guards, an incident mentioned in her autobiography.

The Grade I listed parish church of South Mimms (usually spelt “Mymms” in this context) is dedicated to Saint Giles.

It is not structurally divided from the nave, which appears to have been rebuilt at the end of the 14th century, the date of the windows and doorway in the south wall.

The north chapel and aisle, with their arcades of two and four bays, were built in the early 16th century and the latter was apparently complete by 1526, when the stained glass windows depicting its donors were in place.

The chapel, which may be a little older than the aisle, is enclosed by wooden screens decorated with the leopard's head badge of Frowyk.

There was a gallery for children at the west end, extending some way along both sides of the nave, and there were box pews, a lofty pulpit, and a reading desk.

In 1846 a flint-and-brick wall was built at the west end of the church and Lord Salisbury, as lay rector, was asked to repair the chancel.

By 1876 the fabric was causing concern and the vestry accordingly appointed George Edmund Street to carry out a complete restoration.

There are 17th-century floor-slabs to the families of Norbury, Marsh, Howkins, Adderley, and Ewer, and a canopied altar-tomb with some Renaissance features, perhaps that of Henry Frowyk (d. 1527).

In the north chapel there is a canopied tomb in an earlier style bearing the arms of Frowyk impaled with those of Throckmorton, Aske, Knollys, and Lewknor, and with an effigy of a man in armour adorned with the Frowyk leopard's head; it is probably that of Henry's son Thomas, who died by 1527.

[10] The castle is thought to have been built by Geoffrey de Mandeville, 1st Earl of Essex in about 1141 during The Anarchy, a period of civil war between the forces of the Empress Matilda and those of King Stephen.

These works found that the wooden keep, a large framed tower with tapered sides, had been built on the natural ground level and the motte had been piled up against it afterwards, using spoil from the ditch.