 The first significant alteration made to the building was the single, long gallery added by Sir James Pennethorne in 1860 – 1. Ornately decorated in comparison with the rooms by Wilkins, it nonetheless worsened the cramped conditions inside the building as it was built over the original entrance hall. Unsurprisingly, several attempts were made either to completely remodel the National Gallery (as suggested by Sir Charles Barry in 1853), or to move it to more capacious premises in Kensington, where the air was also cleaner. In 1867 Barry's son Edward Middleton Barry proposed to replace the Wilkins building with a massive classical building with four domes. The scheme was a failure and contemporary critics denounced the exterior as "a strong plagiarism upon St Paul's Cathedral".
