The main structural work on the MSG Sphere concert and event venue just off the Las Vegas Strip is nearly complete, the builder announced [Tuesday].

The venue, a partnership between Madison Square Garden Entertainment Corp. and the Venetian, will be the largest spherical structure in the world, an MSG official said.

With the steel shell that will hold an array of LED screens nearly finished, construction workers took a break this morning for a topping-out ceremony.

“Because of the geometry of the structure, this was one of the complex parts of the project,” said Nick Tomasino, senior vice president of construction for the project.