Children's Art Missing From Vienna Post Office!

For as long as I can remember (many years) with one brief exception, the walls of our Vienna Post Office have been graced with art produced by children in local schools.  During a visit to the Post Office today (9/28), however, I was dismayed to find the walls bare of art.  When I asked a postal employee what happened to the art I received the terse reply "I don't know."  Does anybody know?  That art always made waiting in line a joy.  I, for one, miss it and would love to see it return!