Bluesky’s CEO trolled Mark Zuckerberg with a T-shirt. You can now buy it.

UPDATE: Mar. 13, 2025, 3:15 p.m. EDT All sizes of Bluesky’s “A WORLD WITHOUT CAESARS” shirt bought out in lower than half-hour. We have requested the corporate whether or not it is planning a restock and can replace this story if/after we hear again. Our authentic story follows.

The T-shirt heard across the World Large Internet can now be yours.

The social media platform Bluesky has begun promoting a model of the shirt worn by its CEO Jay Graber at SXSW in Austin this week. Graber took the stage for a keynote session Monday in an outsized black tee bearing the phrase “Mundus sine caesaribus,” which is Latin for “a world with out Caesars.” As Mashable’s Likelihood Townsend reported, it was a transparent dig at Meta CEO Mark Zuckerberg, who infamously wore the same shirt referencing a Roman ruler on the firm’s developer convention final 12 months.

As of Thursday afternoon, Graber’s shirt is now accessible for buy for $40 in sizes small via XL at worldwithoutcaesars.com. Based on the web site, “Any proceeds profit the AT Protocol developer ecosystem, the open community that Bluesky is constructed upon.”

Graber’s shirt is a close to copy of the one Zuckerberg donned for Meta Join 2024 — similar design, similar typeface, however very totally different message. The Fb founder’s authentic shirt learn “Aut Zuck aut nihil” (“Zuck or nothing”), a spin on the Latin phrase “Aut Caesar aut nihil” (“Both Caesar or nothing”). Zuckerberg has seemingly spent a number of years chasing an obsession with the Roman emperor Augustus Caesar.

Mashable has reached out to Meta for remark.

Townsend reported that Graber doubled down on her anti-tech exec messaging in her SXSW keynote, emphasizing the worth of open-source, decentralized platforms like Bluesky.

“If a billionaire tried to smash issues, [Bluesky] customers may simply depart — with out dropping their id or information” Graber stated.

Bluesky launched in 2023 as an invite-only platform and shortly took off as an alternative choice to Elon Musk’s X. As of March 2025, it has over 32 million customers.