There are many collections in the memorial hall of the famous poet Shelley. If you like poetry or this writer, you can stop and admire it. You also need to buy tickets to enter. There are many picture albums.
I personally like Shelley very much, so I just came and took a look. There were not many people who opened the door at 10:00, and the only visitors were just a few glances. There are many different versions of works by two writers in various periods. .
This memorial is next to the steps of Plaza de España, a very small door. After entering, you will first watch a documentary, and then there will be a display of their life and some literary works.
The Keats-Shelley House is a lovely museum/memorial located by the Spanish Steps. It houses a massive collection of memorabilia focusing on Keats, Shelley, Bryon, and others.
A simple memorial, everyone knows it is a famous poet, was very famous during that period, and left a lot to do. Tickets are 5 euros, interested can go in and have a look.
Both are literary masters, especially Shelley, and I'm sure many people like his poetry, so if you're visiting the Plaza de Espana, check out the memorial next door.