Campus XLIV

Undeniable observations: Lots of red tile rooves, buildings with courtyards, a Christian church, a tame river (or canal). Narrow crooked streets.
Long shadows from the bottom of the picture. If these photos are in the usual north at the top orientation, then it is likely to be at a high latitude. No baseball or football stadia observed.
European, or pretending to be.
Based on past behavioural observations, I guess that the two campi are related in some way.

the first one is pisa
http://maps.google.com/maps?f=q&hl=en&q=Pisa,+Tuscany,+Italy&ie=UTF8&cd…

Ha, that's the soccer stadium just off the top edge of the photo.

Pisa adopted the Gregorian calendar in 1750/1751.

You are half way there, the top is the University of Pisa (you can even see the leaning tower), but what is the bottom campus? And how are they connected? Here's another hint.

And how are they connected? Here's another hint.

It's a hand railing from a wheelchair ramp. I have no idea what famous invalids may be associated with the University of Pisa.

That could be Padua. The dome near the top looks like one on the Corso Milano.
The common link between Pisa and Padua would be Galileo Galilei, about whom it is said:

Galileo was never married. However, he did have a brief relationship with Marina Gamba, a woman he met on one of his many trips to Venice. Marina lived in Galileo's house in Padua where she bore him three children.

That rather begs the definition of "brief."

His research while at Pisa and Padua was mostly concerned with the problem of motion, in particular motion on inclined planes, of the pendulum, and of freely falling bodies.

You missed an opportunity. February 29 would have been the ideal occasion to have featured Aloysius Lilius.

And isn't a handrail on a wheelchair ramp superfluous?

Maybe this whole Galileo thing is a wrong turn. It could have something to do with Giovanni Acuto

Galileo would be pissed. That ain't no hand rail, that's Galileo's own instrument that he used to measure acceleration on an inclined plain! (And is housed in the museum of science in Florence which I visited this past fall.) The metal notches were used to measure the distance that a ball moved in a given time over the course of the experiment.

I may have also been a bit too cute with the first hint.

(And is housed in the museum of science in Florence which I visited this past fall.)

Oh that makes sense then. This week's theme is Italian cities starting with the letter P and the clue is a museum display in Florence.

starting with the letter ...

You are teasing me right? You just happen to mention that way of analyzing the clues without reference to the appropriate hint.

(P.S. For anyone else the University of Padua is indeed the identity of the second institution.)

Can you see how all the clues fall into place?

Of course I'm teasing you. Duh.

The other hint. I guess you didn't catch it. It had to do with the first letters ...