Grandtully Castle (4)
While there are certain features of the 19th century extension that clearly do not date back to the 'castle age', the new work has generally been blended so well with the old that it is hard to tell which is which.  Old drawings and engravings such as this are very helpful.

The phallic looking stair-tower on the left is mostly 16th century, but was heightened to provide a watch-chamber and given its ogee roof in 1629, when much of the roofline appears to have been remodelled.  The gable with the corner turret on its right is the east gable of the main block and the gabled tower between the main block and the stair-tower is the south-west tower.  To complete the Z-plan, there is a north-east tower, hidden by the main-block, which the low wing (the chapel) extends off.
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