The current building, on three levels in Baroque Revival style, dates to 1907–1909;[1] it was designed by Hungarian architect Ignác Alpár.
[1] Shortly after the 1918 union of Transylvania with Romania, the school was taken over by the Romanian state, initially by the Directing Council in Sibiu.
Among the scholars who visited and reported a positive evaluation were Nicolae Iorga, Ovid Densusianu and Mihail Dragomirescu.
[1] Soon after, former student Ion Gavrilă Ogoranu formed an armed group, part of the Romanian anti-communist resistance movement; several of its leaders had been classmates at Radu Negru.
In 1982, after being made an industrial high school, it underwent a thorough modernization process, with a number of science and language laboratories being opened.