Poje’s costume, designed by the Stratford Festival, has him dressed like a dignitary at a military ball, with black tux and tails, and an old medallion that Weaver determined — after some research — dates back to the Roman emperor Constantine the Great. Encircling a cross are the words “In Hoc Signes Vinces.”                       
“It’s rumoured (Constantine) saw this symbol in the sky before his battle and it meant ‘In this we shall conquer,’” Weaver said. “And so when we read that on Wikipedia or whatever it was just 'OK. It’s a sign that maybe we’re doing the right thing by changing everything.’                       
"It was a good omen. Plus it looks really cool.” (source)         

ok but like imagine figure skater annabeth