It is a scheduled ancient monument[1] and a Grade II* listed building[2] The bishops of Winchester held lands in Waltham from Saxon times, having acquired it from King Edward the Elder in 904 in exchange for lands at Portchester.

The bishop having supported his brother, King Stephen in the civil war with Matilda.

[3] After Henry de Blois returned from exile in 1158 the palace was rebuilt, probably with further development under his successor, Richard of Ilchester.

[3] The palace was popular with Royalty, visited by Henry V, and used by Mary Tudor just prior to her marriage to Philip II at Winchester Cathedral.

[5] Henry VIII met Emperor Charles V at the palace in 1522 to negotiate the Treaty of Waltham.