More were uncovered during subsequent alterations between 1917 and 1919.

This last painting soon fell into a poor condition and was destroyed during alterations to the building in 1827.

The chancel and nave probably date from the first years of the 13th century, though all the original details have been removed during subsequent alterations.

There are windows of various dates, and others were removed during the frequent extensions and alterations.

There were previously two cottages here and during early alterations the gallery came within the house.

The line of railway where this occurred was closed in 1908 during alterations at Sentry Hill.

The level was raised further during alterations by William Butterfield in 1871-2.

There was no sprinkler system, and some of the fire barriers in the ceilings had been pierced during alterations to the building.

However, elevators or lifts are never required to be installed during alterations if it is technically infeasible to do so.

This theme has been constant during all subsequent rebuilding and alterations to the palace.