Simplify the following text for a Grade 13 native English-speaking person.
Original: The Museo Teatrale alla Scala ( La Scala Theatre Museum ) , accessible from the theater 's foyer and a part of the house , contains an extraordinary collection of paintings , drafts , statues , costumes , and other documents regarding opera and La Scala 's history .
Simplified: There is also a La Scala Museum ( Museo Teatrale alla Scala ) which has an extraordinary collection of paintings , drafts , statues , costumes , and other documents about opera and La Scala 's history .