This text (in Hebrew, of course) has been above the entrance to the Portuguese Synagogue since 1672 (yes, 1672, that is not a typo). The building itself is beautiful, and an oddity in that most all of the other Synagogues in The Netherlands were destroyed by the Nazis, this one was not, and it is a mystery as to why until this day.
Major restoration is going on at this time. You can still see (at least from the outside) a row of buildings that houses the winter Synagogue, the office and archives, the Rabbinate, mortuary and a library. For those of you familiar with the layout of a (Ashkenazi) synagogue, you will find the inside of the Shul different, as it is Sephardic custom to place the Ark (where the Torah would go) at one end and the Bimah (the pulpit) at the other end. The floor is covered with sand, as is the Dutch custom, to muffle noise, as well as absorb dust, moisture and dirt. Take note of the beautiful brass chandelier. They hold more than 1,000 candles and provide the only lighting in the Synagogue.
You should see this in conjunction with your visit to the Jewish Historical Museum, which is about 10 meters away. You have to be buzzed in for the sake of security, understandably so. The gift shop is wonderful. A lovely unique gift that I have not seen anywhere else are some beautiful "delft style" tiles with the Hebrew House blessing on it. The docents inside are more than happy to answer your questions.
If you own or manage Portuguese Synagogue, register now for free tools to enhance your listing, attract new reviews, and respond to reviewers.