 Complete the following phrase:  The building at the core of Hamilton Palace was a 13th-century tower house known variously as The Orchard or the Castle of Hamilton, which was the seat of the Hamilton family. The earliest reference to a castle at Hamilton is in a charter of 1445, when James Hamilton was created first Lord Hamilton. When the palace was demolished in the 1920s, the remains of walls up to thick compared to elsewhere in the building, were discovered in the north-west quarter, clearly indicating the defensive nature of the medieval core of the palace. In 1451 the medieval parish church of Hamilton which stood to the east of the later palace was promoted to collegial status by Lord Hamilton. The Orchard was the object of much destructive attention on the part of royal armies in the period between 1565 and 1579, suffering damage in a siege of 1570 during the 