The words for port and door are quite the same in Latin languages. Actually, it is hardly a stretch for English speakers to grasp the relevant vocabules for a place of entry and exit.
In the case of Buenos Aires, however, I found poetry in how the very doors of the city reflected the amazing variety of stories that have come together to carve, paint and frame an incredible history of immigration to this port city from around the world. It is as if the very meaning of porteña — as all that which is local is called — signifies ecclectic.
You can see it their portals: