Bruce built a second gothic tower to mirror the existing one built by James V between 1528 and 1532, and created the courtyard block in a restrained classical style. A second phase of work started in 1676, when the Duke of Lauderdale ordered Bruce to demolish and rebuild the main west façade, resulting by 1679 in the screen wall, topped by a carved imperial crown, which forms the main entrance.
Bruce built a second gothic tower mirroring the existing one constructed by James V between 1528 and 1532, and created a courtyard block in a restrained classical style. A second phase of work began in 1676 when the Duke of Lauderdale ordered Bruce to demolish and rebuild the west facade, resulting in a screen wall with an imperial crown at its peak, which serves as the main entrance by 1679.