A fourth monolith has been found — on the Isle of Wight

There’s nothing “mono” about these anymore, that’s for sure.

A fourth monolith — similar to ones found in Romania — was discovered Sunday on the Isle of Wight.

The mysterious metal object was spotted by a local on the island off the south coast of England, Sky News reported.

“I knew about all the monolith stories recently, so I recognized it straightaway,” witness Tom Dunford told the outlet.

The 29-year-old said he was walking his dog with his fiancée and sister around 7:30 a.m. on the island’s Compton Beach when he came upon the silver structure.

It was about 10 feet tall and “really reflective,” Dunford said.

The discovery of the three-sided object caused a stir, with several locals flocking to the site.

“The person who put it there knows what they’re doing,” said Dunford, adding that he believed the sculpture was placed there by “someone playing a practical joke.”

The mystifying monoliths have stirred worldwide speculation since they began cropping up, first in a Utah desert, then a hill in Romania and finally last week atop a mountain in Atascadero, California.

Theories about their origins have ranged from a marketing ploy to extraterrestrials — though a small community of “stunt artists” has since claimed credit for the US sculptures.

The community of artists known as The Most Famous Artist are even offering up more of the works — for a hefty $45,000.

It doesn’t appear that the collective is behind the latest object on the Isle of Wight.

Founder Matty Mo told The Post in a message, “The monolith is out of my control at this point.”

“The idea was to start a global phenomenon,” he added. “I’d say mission accomplished. I hope every city gets a monolith. It brings people together and spreads joy.”