Once 2B is completed, 2D will close and receive similar upgrades, including the addition of a new floor.

The terminal saw the addition of a second floor.

Upgrades to the quadrangle were completed in 1966, which was an addition of a second floor and basement levels.

Originally one story, structural alterations were made in 1843 with addition of a second floor.

Construction began on a five-story building, but demand for office space spurred the addition of a sixth floor.

Architectural plans allow for the addition of a third floor to the structure.

Of medieval origins, it was first enlarged in the late 16th century with the addition of a top floor.

It was renovated with a new façade and the addition of a fourth floor.

Works included the Andalusian courtyard, the addition of a third floor and two towers.

The largest change was the addition of a third floor; the planned demolition of a wing did not take place.