Okay kiddo, do you know what a porch is? It's like a covered area at the entrance of a house where you can sit outside and relax while still being protected from rain or sun.
Now, imagine a really big and fancy porch with really cool sculptures and columns. That's what the Portico of the Aetolians is!
It's a really old building in Greece that was made a long, long time ago. The Aetolians were a group of people who lived in Greece a really long time ago too.
The Portico of the Aetolians was built to honor them and it has a lot of cool Greek designs on it.
So when you see the Portico of the Aetolians, just think of it as a big and fancy porch that is very historical and important in Greece.