Maybe I shouldn't even mention this as we did not get to go in, but it appeared to be a very lovely synagogue. However, we were there on Saturday not thinking about the fact that they would be having services. We would not have gone in anyway, but there was a very friendly gentleman outside the entrance explaining that the services were taking place.
One irony of its location is that it is on Saint Francis street. You would think they could have renamed the street in front of the Jewish house of worship.
On San Francesco at Piazza GiottI
Trieste had four beautiful ancient temples, all of which were destoyed.
Above the doors of the temple there are the symbols of the Jewish community : a crown, the breastplate of Aron, palms and a sheaf of corn. Inside are gilded frizes, marble walls, and an imposing organ. There is also a Mikveh (ritual bath) in the basement.
In Via San Francesco is the Tempio Israelitico (Israelite Temple), finished in 1912 and consecrated in the presence of Prince Hohenlohe. It is based on Syrian patterns and is oriented along the East-West axis, in accordance with the Jewish tradition.
The Synagogue of Trieste is situated off the beaten path and not easy to find if you don't know the city. The best way is from the main street Via Carducci, turn left in Via Cesare Battisti and after several hundreds of meters turn left into Via Donizetti. It is situated at the corner which makes Via S. Francesco d'Assisi and Piazza Giotti. I don't know much of the synagogue except is is the biggest in whole Italy.