Blueskys CEO trolled Mark Zuckerberg at SXSW 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 sold out in less than 30 minutes. We’ve asked the company whether it’s planning a restock and will update this story if/when we hear back. Our original story follows. The T-shirt heard around the World Wide Web can now be yours.The social media platform Bluesky has begun selling a version 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 oversized black tee bearing the phrase “Mundus sine caesaribus,” which is Latin for “a world without Caesars.” As Mashable’s Chance Townsend reported, it was a clear dig at Meta CEO Mark Zuckerberg, who infamously wore a similar shirt referencing a Roman ruler at the company’s developer conference last year. SEE ALSO: Bluesky CEO: imagine a ‘world without Caesars’ As of Thursday afternoon, Graber’s shirt is now available for purchase for $40 in sizes small through XL at worldwithoutcaesars.com. According to the website, “Any proceeds benefit the AT Protocol developer ecosystem, the open network that Bluesky is built upon.” Opens in a new window Credit: Bluesky “A WORLD WITHOUT CAESARS” shirt $40 at Bluesky Shop Now Graber’s shirt is a near copy of the one Zuckerberg donned for Meta Connect 2024 — same design, same typeface, but very different message. The Facebook founder’s original shirt read “Aut Zuck aut nihil” (“Zuck or nothing”), a spin on the Latin phrase…Blueskys CEO trolled Mark Zuckerberg at SXSW with a T-shirt. You can now buy it.