Lucca is interesting and famous for its walls. The city was founded by the Etruscans in the 3rd century BC named Luk (meaning marsh). It later became a Roman colony in 180 BC. Inside, the city has a rectangular grid, and this reflects the original Roman street plan. There are traces of the Roman amphietheatre in the Piazza dell'Anfiteatro.
Construction started in 1500 and they still today entirely enclose the city. Today you can walk along the top of walls looking out and into the city. The Passeggiata delle Mura Urbane is the street atop the walls that links the bastions.
We stayed in Lucca on one of our trips. As we left we felt that we had not stayed enough time. But when we returned on other trips we were unable to get a hotel in the city and have ended up in other parts of Tuscany. Of course, these were the days when we had no reservations we would just arrive and find a place. Finally, determined to stay in the town we booked into one of the hotels in the centre, paid a hefty price, but had the advantages of staying in the town. That night we attended a concert in one of the churches. Yes remember that hotels and accomoodations are all about location, location, location.
There are always interesting people in the Piazza. Now, feeding the pigeons is frowned on!
You will most likely see posters for concerts in churches. Usually well priced.