After touring the interior, you can climb the stairs – or take an elevator – to the marble-paved roof, 20 stories up, for the most memorable part of a Duomo visit.

Precision and creative design, along with a merger of languages and unexpected atmospheres: here is the double soul of the Italian firm.” Established in Milan in 1999 and in Shanghai in 2012, the ...

A version of this article appears in print on Feb. 19, 2023, Section A, Page 6 of the New York edition with the headline: Milan’s Duomo, a High-Maintenance Icon for 637 Years, Is Still Adored.

For an annual fee of €25,000 (RM117,370) for up to three years, companies can take in one of the Duomo statues – and in doing so, benefit from a tax break, and even a little history.