"...a monastery in northern Russian first erected and used by Ivan the Terrible to imprison anti-Soviet White Russian officers and men ..."
He was the Russian Tsar, 1533-84 - I didn't know there were anti-Soviet White Russian's back then.
were established in February 1920 in the prison
[in a monastery in northern Russian first erected and used by Ivan the Terrible]
to imprison anti-Soviet White Russian officers and men
That is, Ivan the Terrible built and used the monastery, which later converted by Bolsheviks to imprison.....
Me too! I think it should have been written something like this:
“The Solovetsky Camps of Special Assignment known by the Russian acronym SLON were established in February 1920 to imprison anti-Soviet White Russian officers and men in the prison of a monastery in northern Russian first erected and used by Ivan the Terrible, Brodsky reports.”