Thank you Riccardo for the stay in your flat.
We were welcomed by the neighbour who was waiting for us. The flat was in very good condition and spotless. The air-conditioning works perfectly (important in August). There was even water in the fridge at our disposition.
The flat lies in a quiet street, quite centrally located, from which we visited Palermo by foot without ever needing any public transportation.
In summary, this flat was everything we were looking for to stay in and visit Palermo.