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The industrial complex produced synthetic ammonia used for explosives, nitrogenous fertilizers, and chemical products and to study and utilize new industrial procedures in the chemical, physical and mechanical fields.
It was located in a plain area of over 40.000 square metres between the Nera River and the slopes of the Obito hill.
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The SIRI (Italian Company for Industrial Research) was built in 1925 and occupied the complex of the former Papal Ironworks built in 1794. It became famous in Italy and aboard in the field of industrial research. However in the ‘60s the increasing difficulties in the industrial activity –mostly caused by the changed conditions of markets and technologies- lead to the closing of the plant in 1983. The growth of the complex was inhomogeneous: new buildings leant against the old ones, leaving a big free area in the middle, where is still visible the small lake created by the water of the Nera River and its constructions for the use water collection for the power plants of the complex. The main entrance of the complex is still marked by a gate decorated with cast iron eagles and cuspidate spheres. The gate is near the small building that once was the porter’s lodge and the house of the keeper. On the right of the old tree-lined avenue there were the worker’s houses, lined on two levels, while all the other buildings were used as production departments.
The city of Terni owned part of the area from 1997 to 2002 and renovated it.
Since 2009 it is owned by the CAOS, Centro Arti Opificio Siri.
