Selling of monuments: What does it mean?
Many private schools and other private institutions ask donors for money. Often what they offer in return is naming rights to a classroom or a lecture series. The big items are football stadiums and such. 

When I was a kid and our church wanted to build a new school they offered naming rights to things, such as classrooms. The donor would get a plaque. One local library "sells" bricks with brass plaques that are arrayed around the entrance to the building. 

Of course, this is in addition to the major donors who put up an entire building or fund a professorial chair. 

Usually the "monument" isn't a big thing taking up space, just a visual recognition of a donation. Nor is it usually a donation big enough to actually fund the thing in question. It adds a bit of revenue at little cost. It gives "bragging rights" to donors. 

Some publicly funded institutions do the same thing, of course.