The Challenge: Identify building on back of Ghana's 20,000-cedi note

Today’s challenge is to identify the building which appears on the back of the old 20,000-cedi note of Ghana.

If you can precisely identify the name and location of this building—or have a lead which you think might be useful—please post a comment, preferably including a URL which links to evidence supporting your identification.

This building appears on the back of all of the 20,000-cedi notes from 2002-2006 (Pick 36):

IDENTIFIED: National Theatre of Ghana in Accra.

Courtesy of Frederick Martin.