Translation of Nachhaltigkeit

In this email I would like to tell you what occured to me in Italy during the summer vacation last year. So, I went to Italy for four days. First I stayed in Firenze, than I decided to go to Rome.
In my next message to you I want to write everything in German. Than I will rewrite it in English and we can compare the output. This way you see the text in your mother tongue and in a foreign language.
By the way, after my horrible experience I had changed the hostel. The place was not really better but much more quiet and near the Ocean. I woke up with the sound of a siren. It was the police.