page_title: Roman Catholic Diocese of Helena
section_title: History
hierarchical_section_title: Roman Catholic Diocese of Helena / History
caption_attribution_description: English: The Cathedral of the Sacred Hearts of Jesus and Mary Catholic cathedral in Helena, Montana until the present Cathedral of Saint Helena was first used in 1914.
context_page_description: The Diocese of Helena is the Catholic diocese for western Montana with its cathedral located in Helena, the state capital. The diocese was erected from the year-old Vicarate of Montana on March 7, 1884, while Montana was still a territory. The diocese is a suffragan of the Archdiocese of Portland, which province encompasses Oregon, Idaho, and Montana.
context_section_description: Before becoming a diocese, this was the Vicariate of Montana (covering the whole territory and then state of Montana).  For its first twenty years, the diocese served all of Montana. In 1904 the new Diocese of Great Falls (later renamed the Diocese of Great Falls-Billings) was formed to serve eastern Montana.
  The seat of the diocese is in the Cathedral of St. Helena in the state capital of Helena. It was completed in 1914.
caption: The Cathedral of the Sacred Hearts of Jesus and Mary, Helena's first cathedral.
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