Dear Luiza, thank you so much for your help! You were so kind and accomodating also after our stay! It was a great and safe stay at your airbnb (good door lock, windows can also be closed safely - they have like an double closing option, code to enter the entire airbnb building - not public entrance). It was near the old town/ city center and great metro system in lisbon (next station is „Rossio“). There was also shampoo and shower gel for using in the flat! Since lisbon is a big city, it would be good to not walk alone at night. Nothing happend, just as a prevention for women.