Amazingly, while at grammar school, we had an exchange with a school in Nahariya, I think it was in Budapest where I had the first conscious contact with European Jewry. I went there twice, once with a youth orchestra, a second time with a student's orchestra. With a group, I visited the big synagogue, which at the time wasn't much more than an architectural impression for me. For I had a certain tunnel view concerning my hobbies and my studies. But as an uptight German protestant, I used to respect signs and orders: When we were passing by a Jewish cemetery, we found there a sign asking the visitors to wear a headdress. We, or not every one of our group, had a hat or a cap with us, and after a little talk about the possibility of entering bareheaded, we decided not to enter. Strangely, I've kept the habit: nowadays, when entering a Jewish cemetery, I remember this Budapest headdress request and I put on a bonnet or kippa, although it's a very superficial cultural gesture.
from the article: Christian churches back Jews facing anti-Semitism in Hungary