(AP) WARSAW, Poland — Poland’s president and descendants of Holocaust survivors held a graveside ceremony Tuesday to honor a Polish diplomat in Switzerland who helped Jews escape Nazi-occupied Poland during World War II by issuing phony Latin American passports.

The ceremony took place at the Friedental cemetery in Lucerne, Switzerland, where Konstanty Rokicki was buried in 1958 in a simple grave after dying in poverty. A new gravestone was placed that describes his role in saving Jews.

Today there was a ceremony commemorating the great Pole, Konstanty Rokicki,who along with #GrupaŁadosia saved many Jews during WW2. President @AndrzejDuda attended the ceremony with his wife. Some of the people who were rescued were among the participants.

Check out our coverage! pic.twitter.com/iFzLciYyXF — PL1918 ENG (@PL1918ENG) October 9, 2018

Rokicki’s actions were a “brighter star in that night of black despair,” President Andrzej Duda told dozens of attendants.

Rokicki was vice-consul at Poland’s consulate in Bern, and worked to get Jews out of Poland with other Polish diplomats and Jewish activists Abraham Silberschein and Chaim Eiss.

During 1942-43, he bought and otherwise obtained blank passports from countries including Paraguay, Honduras and Haiti, and filled them in with names and photographs of Polish Jews, secretly delivered from Poland.

President @AndrzejDuda is going to Switzerland today. Tomorrow the President will take part in a ceremony commemorating the Polish diplomat Konstanty #Rokicki. A group of #PolishDiplomats who saved many Jews during WW2.

Get to know their story and RT!#GrupaŁadosia pic.twitter.com/vgnZAFESzX — PL1918 ENG (@PL1918ENG) October 8, 2018

Historians believe that 330 people were known to have been saved thanks to such passports. The fate of another 430 has not been determined, while a further 387 were killed despite having the false documents.