Established in 1850, the Archdiocese of Seattle turns 175 this year, and we will be celebrating from January through May 2025, including special Masses with Archbishop Etienne and a Season of Service with the goal of reaching 175,000 volunteer hours.
175th anniversary Masses and Celebrations with the bishops
Short History Videos
Watch these short videos of significant historical objects and facts from archdiocesan history.
Blanchet's diary
Catholic ladder
Mother Joseph's tabernacle
Click here to watch more 175th anniversary history shorts.
Season of Service
To honor our local history, while embracing our Catholic Social teachings, we will host a “Season of Service.” From March 1 - May 31, 2025, local Catholics, parishes, schools, ministries and families are invited to participate in service with the goal of reaching 175,000 collective hours of service across Western Washington. Click here to learn more.
175th Anniversary prayer
As we celebrate our anniversary, please join us in praying for the God to continue to grace the archdiocese for another 175 years and more.
Click here to download a prayer card in English, Spanish and Vietnamese.
History of the Archdiocese
When missionary priests arrived in the 1830s, could they have envisioned today’s archdiocese? Learn more about our local church history, from 1838 to present.
Parish resources
Click here to download the 175th Anniversary Communications toolkit, which includes links to digital graphics, talking points and digital prayer cards.