This audio of this video is in Catalan yet the video will give you an idea on what to expect when visiting the museum.
More information:
http://www.mnac.cat/index.jsp?lan=003
http://www.gencat.cat/diue/doc/doc_11973661_1.pdf
http://www.nytimes.com/1996/04/14/travel/secrets-of-catalonia.html?pagewanted=all&src=pm
http://revistes.iec.cat/index.php/CHR/article/viewFile/54339/pdf_154
http://en.wikipedia.org/wiki/Romanesque_art
http://en.wikipedia.org/wiki/Museu_Nacional_d%27Art_de_Catalunya
http://en.wikipedia.org/wiki/Category:Romanesque_architecture_in_Catalonia
Video: © Barcelona Cultura
Source: http://www.youtube.com/watch?v=_7lMMuWuPoo