Assume they're Cupressus sempervirens. https://www.monumentaltrees.com/en/ita/lazio/roma/18957_villadeste/

I'm consulting my Roman son in law.

Thanks floral

I think you are correct.

I wonder why the are refered to as "secular cypress", as the Villa and Gardens were build by and for high ranking clergy.

The phrase seems common on Italian sites. I think they just mistranslated it into English. Awaiting a response.

OK. The results are in. He says it's because it's been around for 'secoli' or centuries. Nothing to do with 'secular'. I've seen similar trees elsewhere in Rome. Just really old C. sempervirens.

Brilliant, floral

Not in Rome. Sitting at home in Kernow, reviewing some past images.

Fof

Oh, bad luck. Although Cornwall must be lovely too.

Back again! I was also looking through pix and found this.

Read the label! Coincidence.

Nice one, floral.

Did some additional searching and found many sites mentioning "Secular" trees, all of which are ancient. eg Secular trees of Italy

Quote from Mirriam Webster dictionary:

In contemporary English, "secular" is primarily used to distinguish something (such as an attitude, belief, or position) that is not specifically religious or sectarian in nature, but, going back to its early Latin root, the word also means "occuring once in an age or a century," "existing or continuing through ages or centuries," and "of or relating to a long term of indefinite duration." These uses of "secular" are common in the fields of science and economics -- "secular oak trees" or "secular inflation," for example.