Preston's Tower was constructed in the early 15th century, either by Sir Henry Preston or by his son-in-law Sir William Forbes, who inherited part of the Preston lands in 1420 following Sir Henry's death. His descendant William Forbes, 7th Laird of Tolquhon (died 1596), began work on a new castle in 1584, retaining Preston's Tower while adding new and more comfortable accommodation. He also improved the gardens and parkland surrounding the house.
King James VI was entertained at Tolquhon in July 1589. The new buildings were arranged around a courtyard and included an elaborate gatehouse and a first-floor
gallery. An inscription on the gatehouse records that “AL THIS WARKE EXCEP THE AULD TOWR WAS BEGUN BE WILLIAM FORBES 15 APRIL 1584 AND ENDIT BE HIM 20 OCTOBER 1589”. The home of a "
Renaissance man", Tolquhon was designed for display rather than defence and was the work of the mason-architect Thomas Leper or Leiper. Leper’s distinctive triple shot-holes flank the main entrance ==Description==