The Fisher Building is known as “Detroit’s largest art object.” The office skyscraper, which opened in 1928, boasts a grand lobby decked out with marble, mosaics, painted ceilings and ornate detailing in brass and bronze. Real estate developer The Platform purchased the landmark in 2015, spending over $10 million in rehabilitation and renovation. But the company was stuck on what to do with the fourth floor, broken into small offices by design for doctors and dentists.