ZAMOSC, Poland—Seventy-two years after the Nazis arrived, the Polish town of Zamosc is getting its synagogue back.One of the most important surviving synagogues in Poland, a Renaissance gem looted by the Nazis and suffering from decades of neglect, is reopening this week after a meticulous restoration, part of an effort to reclaim the country’s decimated Jewish heritage.The refurbishing of the synagogue in Zamosc, an eastern Polish town near the border with Ukraine, comes as Poland’s tiny remaining Jewish community is struggling to preserve some of the most important Jewish sites that survived the Holocaust before they fall into irreversible decay.But in a sign of how thorough Adolf Hitler’s genocide was, there are almost no Jews left in the town. The cream-colored house of prayer will now serve largely as a place for art exhibitions, concerts and other cultural events in the largely Catholic area.”The people, they are gone,” said Michael Schudrich, Poland’s chief rabbi. “But at least in their memory we can do the best to preserve that which remains.”The population of Zamosc, an exquisite Renaissance town recognized as a UNESCO World Heritage site, was 40 percent Jewish on the eve of World War II. Today, there are could be a handful of Jews in the town of 65,000 but nobody really knows for sure, since people here often still hide their Jewish roots, scarred by the trauma of the war and the anti-Semitism of the communist era that followed.”(I don’t) know even a single person who will identify publicly as Jewish,” Mayor Marcin Zamoyski said, although he’s aware of one woman born to Jewish parents who gave her to a Catholic family to ensure her survival before they themselves were murdered.The woman learned of her Jewish roots only as an adult and doesn’t even know her original name.The near-absence of Jews today “brings to light what war and genocide and the Holocaust really mean,” said Monika Krawczyk, CEO of the Foundation for the Preservation of Jewish Heritage in Poland, the Warsaw-based group that oversaw the preservation work. “Although the Jews in Poland today are small in number, the heritage is absolutely huge.”