The document summarizes significant commercial real estate transactions and events in Pittsburgh's central business district in 2017. Key details include the sale of 525 William Penn Place for $67 million and tenants consolidating space. Other major sales included One Oxford Centre for $149 million, One Chatham Center's office portion, and 11 Stanwix for $81 million. Several tenants relocated to new buildings or subleased space, such as McKinsey moving to One PPG Place. New developments included the Distrikt Pittsburgh hotel and parking garages for the former Saks building and Heinz Field.