The Umbrella Pines of Rome

 The Triumphal way, at the end of which stands the Arch of Constantine. 

These iconic Umbrella Pine trees are everywhere in Rome. 

Apparently Mussolini planted many. 

But now these trees are mortally threatened by a pest that got into Italy from the USA. 

Neighbourhood Associations are releasing large numbers of ladybirds in an effort to combat that pest. 

https://commons.wikimedia.org/wiki/
File:Triumphbogen_fexx.jpg

Most monuments in Rome are framed by these trees, as this image from Wikimedia shows.