The Synagogue Shomré Hadas, commonly known as the Hollandse Synagoge. is a modern orthodox synagogue built in Antwerp, Belgium. The building is so named because it was commissioned by descendants of Jews who came to Antwerp from the Netherlands in the early 19th century. It was the first large synagogue in Antwerp. Today the synagogue is used for services only on Rosh Hashana and Yom Kippur.