Complex sentence: The castle is of particular note, as it is where Richard II was handed over to his enemy Henry Bolingbroke in 1399, and is the setting for Act III, Scene III of the Shakespeare play "Richard II".
Split into simpler sentences: The castle is where Richard II was handed over to his enemy Henry Bolingbroke in 1399. As a consequence, it is the setting for Act III, Scene III of the Shakespeare play "Richard II".