The Thirty-fourth Amendment of the Constitution of Ireland was passed by referendum on 22 May 2015 which allowed marriage to be contracted without distinction as to sex. This was brought into effect by the Marriage Act 2015. Katherine Zappone and Ann Louse Gilligan renewed their marriage vows at a ceremony in Dublin City Hall on 22 January 2016. President of Ireland, Michael D. Higgins, along with other Irish politicians, attended the ceremony.