 Every time I go to work and pass in the building, I was wondering what's inside and what they are doing. And tonight I learned both. It was most interesting to hear about the stamps and the history of the Weltpostfalen. I learned 250 people are working here. They are coming from all over the world. I learned a lot about stamps. We spoke online ourselves and we wrote in the building. So that was fun. We had many questions about what would be so difficult about having a post office and then we started elaborating it together and found out that we just take it for granted usually that a post office is working and exists. What we learned today that there's much more involved to that service that we usually think.