The Missionary Sisters Servants of the Holy Spirit, also known as Holy Spirit Missionary Sisters, Holy Spirit Sisters, Steyler Missionary Sisters or Steyler Sisters is a religious congregation within the Catholic Church. The group has 3,000 members in 46 countries. The congregation was founded by Arnold Janssen in 1889 in Steyl, the Netherlands. Janssen had previously founded in 1875 a male missionary congregation called Divine Word Missionaries. Janssen chose Maria Helena Stollenwerk, called Mother Maria (1852–1900) and Hendrina Stenmanns, called Mother Josepha (1852–1903) as co-foundresses.