Question: When did Eleonore Reuss Of Köstritz's husband die?
Sentence (from "Eleonore Reuss of Köstritz"): Princess Eleonore Caroline Gasparine Louise Reuss-Köstritz (22 August 1860 – 12 September 1917) was Tsaritsa of Bulgaria and the second wife of Ferdinand I of Bulgaria.
Relevant evidence: Yes