The law firm of Reed Smith L.L.P. will move its Center City offices for the first time since 1989.

Brandywine Realty Trust said Reed Smith signed a lease for 115,000 square feet of space in Three Logan Square, 1717 Arch St.

The firm, which has more than 150 lawyers in Philadelphia, currently occupies 156,534 square feet in One Liberty Place, 1650 Market St. Reed Smith chief of operations Pat Hiltibidal said the firm intended to move its 300 lawyers, paraprofessionals, and staff in early 2014.

The lease is another win for Radnor-based Brandywine, which also landed the securities brokerage Janney Montgomery Scott last July for Three Logan. Janney will lease 146,321 square feet in the building, formerly known as the Bell Atlantic Tower, that Brandywine bought earlier this year.