▁for ▁" no ble ▁ma ids ". ▁Both ▁sister s ▁were ▁soci ally ▁very ▁influ ential ▁at ▁the ▁Russian ▁Imperial ▁Court . ▁ ▁Nick named ▁joint ly ▁" The ▁Black ▁Per il ", ▁they ▁were ▁interested ▁in ▁the ▁occ ult . ▁They ▁helped ▁to ▁introduce ▁to ▁the ▁Imperial ▁Family ▁first ▁a ▁char lat an ▁myst ic ▁named ▁Philippe ▁N iz ier - V ash od ▁( us ually ▁referred ▁to ▁merely ▁as ▁" Ph ili ppe ") ▁and ▁then ▁Gr ig ori ▁Ras put in ▁. ▁ ▁Children ▁Grand ▁Duke ▁Peter ▁Nik ola ev ich ▁of ▁Russia ▁and ▁Princess ▁Mil ica ▁were ▁married ▁on ▁ 2 6 ▁July ▁ 1 8 8 9 ▁in ▁Saint ▁Petersburg . ▁The ▁couple ▁had ▁four ▁children : ▁ ▁Princess ▁Marina ▁Pet rov na ▁of ▁Russia ▁( 1 8 9 2 – 1 9 8 1 ). ▁Prince ▁Roman ▁Pet rov ich ▁of ▁Russia ▁( 1 8 9 6 – 1 9 7 8 ). ▁Princess ▁N ade j da ▁Pet rov na ▁of ▁Russia ▁( 1 8 9 8 – 1 9 8 8 ). ▁Princess ▁Sof ia ▁Pet rov na ▁of ▁Russia ▁( 3 ▁March ▁ 1 8 9 8 ▁– ▁ 3 ▁March ▁ 1 8 9 8 ); ▁buried ▁in ▁the ▁convent ▁c emetery ▁in ▁K iev ▁by ▁her ▁grand m other , ▁Grand ▁Duch ess ▁Alex andra ▁Pet rov na , ▁who ▁was ▁a ▁nun ▁there . ▁ ▁References ▁ ▁External ▁links ▁The ▁N j egos k ij ▁Fund ▁Public ▁Project ▁: ▁Private