A small "synagogue", possibly an oratory, was once located in Villa Opicina, a suburb of Trieste on the edge of the Karst plateau where bourgeois families used to spend their summers. A Jewish children's summer camp was also established there in 1932, but it was closed down in 1939 in the wake of racial laws passed the previous year.

Photograph of the "synagogue" of Villa Opicina, likely dating to the 1950s Source: https://www.informatrieste.eu/ts/blog/la-sinagoga-di-opicina-e-la-torre-di-babele/		Photograph of the "synagogue" of Opicina, today a Catholic chapel of the Collegium Marianum Source: https://m.facebook.com/groups/triesteierieoggi/permalink/3579297982093766

The summer camp is mentionef in a file compiled in 1942 by the Jewish community of Trieste on request of the president of the Union of Italian Jewish Communities, Dante Almansi (1877-1949); the synagogue does not appear in the report, possibly because it was 'private', being annexed to a villa. Almansi asked for the report because he wanted to update the list of active and unused synagogues, oratories, cemeteries and other institutions pertaining to Italian Jewish communities.