Helena of Bulgaria

Helena of Bulgaria (c. 1315 – 7 November 1374), born Elena Sratsimir, was a Bulgarian princess and empress consort of Stefan Dušan of Serbia. Daughter of despot Sratsimir of Kran and sister of Tsar Ivan Alexander, she married Dušan in 1332 to seal the Bulgarian-Serbian peace, bearing him Stefan Uroš V.

After Dušan's death in 1355 she was regent for her son and ruled a principality around Serres. She took the veil as Elizabeth in 1359, governed Serres until 1365, and was canonized as Saint Elizabeth.