CI Design Inc., an international architecture design firm with offices in Boston, Baltimore and Dubai, has signed a multi-year, 5,000-square-foot lease at 263 Summer St. in Boston.

Boston Realty Advisors’ commercial leasing brokers, Jason Weissman and David Lank, represented the tenant in the transaction.

CI Design was formed by the former principals of architectural design giant, Cubellis. After Cubellis closed its doors in late 2009, principals Richard Rankin, John Larsen and Christopher Ladd reorganized under the CI Design flag with a sharp focus on mixed-use, retail, hospitality, residential and office projects for their international client base.