(This post has been updated)

When the newly renovated and remodeled Minnesota Capitol debuts in early 2017, it will feature what planners are describing as a major boost in the amount of space and facilities that are open and available to the public.

That includes a third-floor "Cass Gilbert Library," named after the building's original architect, that will be illuminated by a series of newly recovered, original skylights that have been boarded up for decades. Also new to the Capitol will be a public information center, an increase in the number of bathrooms and elevators, two reservable public dining rooms and a couple of public classrooms, and a room for mothers of young children.

"This is going to be some really fantastic public and available space that will restore a lot of the 1905 original architecture," Matt Massman, commissioner of the Department of Administration, said Thursday at a meeting of the Capitol Preservation Commission, a panel led by Gov. Mark Dayton that's overseeing the $273 million renovation project. The Capitol originally opened to the public in 1905.

Dayton and the panel of lawmakers signed off on a "space allocation agreement" at the Thursday meeting, after several weeks of negotiation between Gov. Mark Dayton, Senate Majority Leader Tom Bakk and House Speaker Kurt Daudt. By striking a deal late Wednesday and making it official Thursday, the elected leaders just avoided what construction managers warned would have been costly delays if the space negotiations had continued to drag on.

The final deal left the Senate with considerably less space in the remade Capitol, both compared to before the renovation and to what Bakk had originally sought. Pre-renovation, a total of 39 state senators had offices in the Capitol; Bakk said he had sought 23 senator offices after the construction, but in the end he settled for four.

That leaves 63 senators who will have offices in a new Senate office building that's currently under construction north of the Capitol. That project has been politically controversial, but Bakk said it created the space that's needed to create more public space in the remade Capitol, and to give more room in the big building for the governor's office and the House.

"The Capitol would permanently be a Senate office building if it weren't for that project across the street," Bakk said.

The four Senate offices that remain in the Capitol will likely go to the majority and minority leaders, and likely two top committee chairs. Bakk stressed that no state senator would have more than one office. Rep. Paul Torkelson, a House Republican on the preservation panel, said no House members would have permanent office space in the new Capitol. House members all have offices in another adjacent building, the uncreatively named State Office Building.

The governor's office is gaining about 7,000 square feet of space in the renovated Capitol, while the House will gain about 2,700 square feet of additional space. The Senate is surrendering nearly 43,000 square feet of space.

In recent months, the premier building of Minnesota government has been rung by scaffolding and wrapped in sheets of white canvas as work crews execute the renovation. Major portions of the building are currently closed off to lawmakers and the public alike even as the 2015 session has gotten underway. The renovation project is scheduled to be finished up in time for the 2017 legislative session.