Designated a National Historic Landmark in 1989, the art deco Guardian Building is a must-see for architecture buffs. Known as Detroit's Cathedral of Finance, the Guardian Building was completed ...

licensed under CC BY-SA 2.0 (Guardian Building); Raymond Boyd/Getty Images (Historic Fort Wayne); Annalise Frank/Axios (Michigan Central); Annalise Frank/Axios (Detroit Institute of Arts ...

Flashback: The Guardian Building was built for the Union Trust Co. with 1.8 million unique "Guardian orange"-colored bricks and opened in 1929, according to Historic Detroit.