Facebook CEO Mark Zuckerberg's haircut is a source of fascination, even during the coronavirus pandemic. According to a recent Instagram post, his wife Priscilla Chan has been keeping his hair in check while Facebook headquarters in San Mateo County, California, slowly begins to reopen some businesses. In his post, he wrote "New normal: this lockdown is officially two haircuts long."

New normal: this lockdown is officially two haircuts long. A post shared by Mark Zuckerberg (@zuck) on May 16, 2020 at 2:42pm PDT May 16, 2020 at 2:42pm PDT

While Zuckerberg was testifying about the company's Libra cryptocurrency before the House Financial Services Committee in October, some viewers were focused on policy — but others were focused on his hair.

Rep. Katie Porter even brought up his hair during the hearing.

One person on Twitter pointed out that the short haircut might have something to do with Zuckerberg's fascination with Augustus Caesar, the first-century Roman emperor.

—The Discourse Lover (@Trillburne) October 23, 2019

In a 2018 New Yorker profile, Zuckerberg revealed his admiration for the emperor — he and his wife, Priscilla Chan, even went to Rome for their honeymoon.

"My wife was making fun of me, saying she thought there were three people on the honeymoon: me, her, and Augustus. All the photos were different sculptures of Augustus," he told The New Yorker.

Zuckerberg and Chan also named one of their daughters August.

That admiration may be why Zuckerberg's hairdo closely resembles the "Caesar" haircut, though the style is actually named after Julius Caesar.

Julius Caesar. Hilverd Reker/Flickr

But Augustus, Julius Caesar's great-nephew and adopted son, has similar hair in most statues depicting him.

Augustus Wikimedia Commons

Facebook did not respond to Business Insider's request for comment on where Zuckerberg drew inspiration for his 'do, so while we don't know for sure, it's possible the Caesars' iconic cuts were the source.