Nope

 

If you saw this slide image and thought "The Colosseum, in Rome."

Nope.

It's Arles Amphitheatre (in Arles, France)

And I think this is the photographer's location.

Bonus - The Pastry A.I. That Learned to Fight Cancer

In Japan, a system designed to distinguish croissants from bear claws has turned out to be capable of a whole lot more

"The Wife's Mother is staying for the weekend...."

 

It's the rules. Any visit to an ancient Roman or Greek amphitheatre will always involve a middle-aged "wit" thinking he can launch into his pub comedy routine.

If only they could release the wild animals on him.

I think that this the Roman Theatre, Sufetula, Sbeitla, Kasserine Governorate, Tunisia

Bonus - Strange and wondrous creatures: plankton and the origins of life on Earth

Archeology In Action

From a box of slides containing many of Hadrian's Wall sites, so I'm guessing that this is a similar one.

Bonus - O_o

Burnley's Musical Nun.

The Arch

Simple note on this slide - "Amphitheatre Vaison La Romaine", so I'd suggest this was in France 
From a selection of slides from the late eighties / early nineties, and seemingly  various cultural trips in Europe.

Bonus - I always thought it was built on site...
Bonus 2 - Strumpfhosentanz