BALTIMORE (WJZ) — America’s first cathedral is celebrating its 200th anniversary Monday.

To commemorate, the Basilica of the Assumption Of The Blessed Virgin Mary on Cathedral Street, will celebrate with a dedication mass at 2 p.m.

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UNITED STATES – SEPTEMBER 18: Baltimore Basilica, Baltimore, Maryland (Photo by Carol M. Highsmith/Buyenlarge/Getty Images)

Following the mass, there will be an official opening of the adoration chapel located on the lower level of the building.

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It contains relics from Pope John Paul II.

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You can watch the mass on the basilica’s YouTube page.

CBS Baltimore Staff