2 3 ▁September ▁ 1 8 9 1 . ▁ ▁Rel ations hip ▁with ▁Dem id ov ▁Valent ine ▁had ▁a ▁passion ate ▁adm ir er , ▁An atol y ▁Nik ola iev ich ▁Dem id ov , ▁ 1 st ▁Prince ▁of ▁San ▁Don ato , ▁a ▁Russian ▁industrial ist , ▁diplom at ▁and ▁arts ▁patron ▁of ▁the ▁Dem id ov ▁family . ▁▁ ▁An atol y ▁attended ▁her ▁wed ding ▁and ▁even ▁helped ▁assist ▁the ▁event . ▁He ▁offered ▁her ▁a ▁diam ond ▁orn ament ▁whose ▁magnific ence ▁caused ▁the ▁b ride g room ▁worry . ▁The ▁next ▁year , ▁in ▁ 1 8 4 0 , ▁Dem id ov ▁briefly ▁broke ▁off ▁their ▁l ia ison ▁due ▁to ▁financial ▁problems , ▁but ▁later ▁that ▁same ▁year ▁married ▁Math ilde ▁Bon ap arte ▁and ▁res umed ▁his ▁affair ▁with ▁Valent ine ▁on ▁his ▁first ▁stay ▁in ▁Paris ▁after ▁his ▁wed ding . ▁In ▁ 1 8 4 5 , ▁he ▁arranged ▁for ▁Valent ine ▁to ▁sett le ▁with ▁him ▁in ▁Florence ▁and ▁stayed ▁by ▁her ▁side , ▁even ▁though ▁her ▁husband ▁took ▁um bra ge . ▁At ▁a ▁cost ume ▁ball , ▁Valent ine ▁was ▁ins ult ed ▁by ▁her ▁rival , ▁Math ilde , ▁and ▁in ▁response ▁Dem id ov ▁sla pped ▁his ▁wife ▁twice ▁in ▁public , ▁which ▁sign alled ▁their ▁final ▁separation ▁soon ▁there after . ▁ ▁References ▁ ▁Category : 1 8 2 0 ▁birth s ▁Category : 1 8 9 1 ▁death s ▁Category : 1