Trench Coat: Zara (similar here or here)
Top: Zara
Culottes: Monki
Flats: Zara 

This kind of look is pretty much a staple for me at this time of year; culottes and a lightweight coat or jacket make the perfect winter-to-spring transitional outfit. This is another outfit I wore in Rome a few weeks ago (see my travel post here) and it ended up being the perfect thing to wear for walking around the city.