From ESPN:

Tackle Pace agrees with Bears

On the same day the Chicago Bears added a new quarterback, they got someone to protect him.

The Bears have agreed to a three-year deal, $15 million deal with free agent Orlando Pace, a source told ESPN.com's John Clayton. His first-year payout, according to the source, is $6.1 million.

ESPN's Michael Smith first reported the signing.

Moments after acquiring quarterback Jay Cutler from the Denver Broncos, the Bears reached an agreement to sign former Rams left tackle Pace.

From the bottom of the article:

 

Pace had an offer from the Philadelphia Eagles, but he decided to sign with the Bears on the day Cutler was acquired in a trade from the Broncos.

Complete article here.

While he has battled injuries the past few seasons, he is 33.  If he can stay healthy, I imagine he would be a serviceable to good tackle.   Do you think it would be worth it had the Eagles got him for the same price the Bears paid?