It took us about 3 hours to see the entire exhibit, which is in 2 galleries. We saw real religious women in actual habits.
If you are expecting to see really cool originals, I'd suggest Rome. It was cool what they had though. It seemed to be more architecturally orientated in the first half. The second half had things used for the liturgy like spoons. The coolest item was the model of a Jordan Church made in mother of pearl that was a gift to Pope Benedict XVI.
I was a little disappointed in the St. Louis Archdiocese section...I'm almost positive there is more religious art and architecture in this archdiocese than the mosaics at the New Cathedral. Perhaps the powers that be should have gone into Archdiocesan storage and seen if there was anything interesting.... perhaps some stained glass?
Pictures weren't allowed in the exhibit. It was so dark in there that it would be difficult to get decent pictures. There were also guards/watchers everywhere one turned...
The Entrance to the Exhibit
See the Swiss Guard?