Imperium (professional wrestling)

Imperium was a European villainous professional wrestling stable in WWE which consisted of Gunther from Austria, Ludwig Kaiser and Alexander Wolfe from Germany, and Giovanni Vinci from Italy.

Previously working for several European promotions, including together as part of the stable Ringkampf, Gunther and Kaiser (then known as Walter and Marcel Barthel) signed with WWE in 2019. They debuted on NXT UK and were paired with Vinci (then known as Fabian Aichner) and Wolfe; the group changed its name to Imperium and continued the Ringkampf motto of Die Matte ist heilig (German for "the mat is sacred"). During their time in NXT, Walter became the longest-reigning NXT UK Champion, while Barthel and Aichner became two-time NXT Tag Team Champions.

Wolfe was kicked out in May 2021 and Aichner left in April 2022; later that month, Gunther and Kaiser debuted as a duo on the SmackDown and dropped the Imperium name, with Gunther later becoming the longest-reigning WWE Intercontinental Champion. Imperium reunited as a trio and began using the name again when Vinci rejoined in September 2022, but he was kicked out in April 2024 and the stable quietly dissolved later that year. As of 2026, Gunther and Kaiser are the only former Imperium members employed with WWE.