Sister Gregory Kirkus (November 9, 1910 - August 30, 2007) was an English Roman Catholic nun, educator, historian and archivist. Born as Phyllis Kirkus in York, Sister Gregory made her name as an outstanding historian of English convent life whose own biographical work has provided invaluable research tools for historians of the English recusant period. Sister Gregory presided over a collection of antique books, artefacts and manuscripts at the Bar Convent in York, the oldest convent in England, and a girls' school from 1686-1985. Well into her 90s, Sister Gregory gave talks, which were attended by professors of history, schoolchildren and even Robbie Coltrane.