No significant changes are planned at the Fifth Avenue store, which recently doubled its size with the addition of a tower behind the original structure.

The building was originally cruciform but was enlarged in the 15th century by the addition of a magnificent tower and the south aisle.

The most notable improvement was the addition of a conning tower.

The Carthusian church, with the addition of a tower, remains as the parish church.

Construction on the castle, including addition of a crenellated tower, continued through the Victorian era, when it was considered an engineering marvel.

The house was transformed in 1934 with the addition of a gym, classrooms, dormitories, a three-storeyed tower, and a new chapel.

This facade has been altered over time with the additions of a bell gable and a Baroque tower.

Goehr's design remained little changed until 1927, when the church was modified by the addition of a tower and a sacristy.

The hotel is due to be expanded by the addition of a third tower, and adding several floors to one of the existing towers.

Barry's principal innovation was the addition of a tower to the west wing, which was required for water storage.