Need a help. Historical British buildings

[major_setback]

National Gallery:

http://images.google.se/imgres?imgur...LZfg-Qa2pYnYBw

Year 1910:



"There was a lot of public criticism of the National Gallery's building and in 1868 the architect E.M. Barry was asked to submit designs for rebuilding the entire Gallery at Trafalgar Square.
After much discussion, it was decided that the existing building should remain, and a new wing should be added. This was completed in 1876, and added seven new exhibition rooms at the east end, including the impressive dome."

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The Sainsbury Wing should NOT be included in the model!! ..and not the Northern Extension either (I'm trying to find out more about this):

"The Gallery today -The new wing opens

A site next to the Gallery had been vacant since the Second World War, when a furniture shop was destroyed by bombing. The new Sainsbury Wing was opened in 1991, to display the entire early Renaissance collection.
This followed on from the Northern Extension, which opened in 1975, providing considerable extra exhibition space: nine large rooms and three smaller 'cabinet' rooms. These new galleries made use of natural lighting as far as possible.
The Gallery today - Following the completion of the Sainsbury Wing, the Gallery has a total floor area of 46,396 metres squared"

This is the Sainsbury Wing, to the left:

http://nationalgallery.org.uk/visiti...plans/level-2/