A quest over nearly 30 years by an Italian musician to track down music composed by Nazi concentration camp victims will reach fruition in April with the first orchestral performance of many of the unearthed works.

Francesco Lotoro, a music teacher, composer and pianist, tracked down thousands of songs, symphonies and even operas composed in Nazi concentration, forced labour and prisoner of war camps in Germany and elsewhere before and during the second world war.

Lotoro’s search for the lost music involved scouring bookshops and archives as well as interviewing Holocaust survivors. He accumulated about 8,000 pieces of music including scores written on scraps of scavenged paper, toilet paper and newspaper, composed in allied as well as axis camps.

Some of the music will be performed for the first time. It will be heard at a concert by Israel’s Ashdod symphony orchestra in Jerusalem among events marking the 70th anniversary of the founding of the state of Israel.

Among the pieces to be performed for the first time in public is a song written by the Jewish musician, author and poet Ilse Weber, who worked as a nurse in the hospital at Theresienstadt concentration camp and taught some of her compositions to the children in the camp. When Weber’s husband, Willi, was deported to Auschwitz in 1944, she also voluntarily transferred with their young son, Tommy. The family were all gassed.

While none of the songs that Weber wrote in the camp were ever written down, one was memorised by Aviva Bar-On, a child whom she had treated in Theresienstadt – and Bar-On will sing it for the first time since the war.

Other pieces to be performed include Tatata by Willy Rosen and Max Ehrlich, who, before their deportation from Westerbork to Auschwitz, managed to smuggle a folder of their manuscripts out of the camp.

Rosen was a German-Jewish composer, songwriter and noted cabaret performer, who was murdered in Auschwitz in September 1944. Ehrlich was a noted film actor, screenwriter and director who, like Rosen, was a prominent figure on the German cabaret scene in the 1930s. The folder containing their music was discovered decades later in an attic in the Netherlands, about to be thrown away.

Play Video 1:16 Listen to Tatata by Willy Rosen and Max Ehrlich – video

The aim for the concert in April is to emphasise the importance of music and composition as a form of self-expression, which continued despite the conditions of the wartime ghettos and camps – a phenomenon that has been noted by researchers at the Yad Vashem World Holocaust Remembrance museum.

Describing the project, Lotoro said: “The compositions from the concentration camps are a world heritage, a legacy to those artists who despite losing their freedom in the most unimaginable circumstances persevered through their music. Through the concert we are striving to both restore life and dignity to these artists.”

He described how he had heard about Bar-On’s recollection of Weber’s music. “I heard there was a survivor from Theresienstadt who said she remembered a song by Weber. When I went to see her I discovered that she could remember not only one but three of Weber’s melodies, and scored them.”

That was not the only example of a survivor recalling melodies over the decades. “Some of the melodies were never written down. They were conserved in a memory that is disappearing as survivors die. Every month or so I hear of a friend dying.”

Michael Sinclair, of the Jewish National Fund UK, which is supporting the performance, said: “With global antisemitism on the rise the concert is a timely and powerful reminder of both the need to counter hatred and discrimination in all its forms, and the enduring defiance and hope of the Jewish people.”