How did farnham castle change over time?

Farnham Castle, originally built in the 12th century by the Bishop of Winchester, underwent significant transformations over the centuries. Initially a defensive fortress, it was expanded and modified during the medieval period, including the addition of residential quarters and a gatehouse. In the 17th century, it was further renovated into a more comfortable residence, reflecting evolving architectural styles. By the 20th century, it transitioned into a conference center and hotel, adapting to contemporary uses while preserving its historical significance.