The holy, glorious and right-victorious Protomartyr Thekla (or Thecla) devoted her life to God at a time when all Christians were shunned. Her feast day is celebrated on September 24. The Church has given her the title Equal-to-the-Apostles for her missionary zeal in evangelizing pagans.

Text Source: https://orthodoxwiki.org/Thekla_the_Protomartyr

Image Source: http://archangelsbooks.com/proddetail.asp?prod=HTM-A306