How to get the template LABEL from a page?

Is there a way to know which kind of template page I’m using on a given page?

For example: I could have two kind of templates, “two-cols” and “three-cols” and this page tree:

Home
– Info (using “two-cols” template)
– Links(using “two-cols” template)
– Contact(using “three-cols” template)

How can I get the ID of the template for Info page?
Thank you for any hints!

Matteo