Oak apple 29 May that commemorated the Restoration of Charles II in 1660. The popular name refers to the event during the English Civil War when Charles hid in an oak tree. The commemoration persists in some areas today, although festivities have little to do with the Restoration. Oak apple Oak apple or oak gall is the common name for a large, round, vaguely apple-like gall commonly found on many species of oak. Oak apples range in size from in diameter and are caused by chemicals injected by the larva of certain kinds of gall wasp in the family Cynipidae. The adult
Knights of the Royal Oak set aside as "Royal Oak Day," and "Oak Apple Day" to commemorate the Restoration. Celebration was made by the wearing of oak leaves in the hat; oak apples gilded, with a few leaves surrounding them, were sold in the streets of London. The statue of Charles I of England, at Charing Cross, was also decorated with branches of oak on this day. The holiday is still celebrated today as Oak Apple Day. Anglesey Brecknockshire Cardiganshire Carmarthenshire Caernarvonshire Denbighshire Flintshire Glamorganshire Merionethshire Monmouthshire Montgomeryshire Pembrokeshire Radnorshire Knights of the Royal Oak The Knights of the Royal Oak was an intended order