That was an interesting looking place (synagogue?) to donate the
Hungarian Currency to. Interesting history.
After WWII the shul was boarded up. It remained boarded up until the Russians withdrew. Upon opening the space they found everything sort of rotten, but intact. They have been working on restoring it over the years. During the war there were many Jewish children that were given to Christian families for safe keeping. These kids grew up as Christians. Many still live in the same neighborhood. Among the missions of the shul has been to find the surviving children and bring them home. Interesting to meet an elderly man that didn’t know he was a Jew until 20 years ago. Good people.
Since you seem to know Budapest, can I assume that the Holocaust
Memorial will be open Christmas week? It seems they would be, since
they aren't celebrating Christmas.
I guess you have a point. I suggest you contact them and confirm: http://www.hdke.hu/en/contacts
Are there any other Jewish historical sights I should see?
The Shoes on the Danube comes to mind. The House of Terror. The Rumbach utca Synagogue is good as is the Dohany utca synagogue (aka Great Synagogue). Then there are the Stolpersteine (stumbling stones): https://www.google.com/maps/d/viewer?oe=UTF8&ll=47.502707,19.069347&t=m&source=embed&ie=UTF8&msa=0&spn=0.055664,0.109863&z=13&hl=en&mid=z1PJp-HQ_qTY.kijp6a3KBut0
I saw that one of the walking tours goes by several synagogues and we
won't have a car, so I am interested in other sights we can walk to.
You don’t need a car in Budapest. Its more trouble than its worth. The city has a great public transportation system. Especially the Trams!!!
You can see most of the old quarter on your own with a decent guide book and a map. Its an interesting neighborhood for the jewish heritage and because of all the good restaurants and bars in the area. These guys have tours and the paid tour of the Dohnay utca synagogue is a good investment: http://www.greatsynagogue.hu/jewishquartertours.html#stand This was an excellent tour a few years ago: http://www.beyondbudapest.hu/english/tour_juice.html You will see places where few tourists go.
We are staying a couple of blocks from the Hungarian National Museum.
Hopefully north of the Museum.