The Mass setting was Louis Vierne's Messe solennelle. You can see and hear some of the sights and sounds of the liturgy here:
Here as well are some photographs of the happy event:
Following the Mass there was a reception with a gift presentation to Abbé Herman.
In addition to the gift of a missal, I would be remiss to not note also the gift of three bottles of what would appear to be Trappist Chimay.
Photography by Phil Roussin