Membership     Become a member of the Landmarks Illinois, the only statewide nonprofit organization dedicated to protecting the great architectural heritage of the state of Illinois. Gift Membership is easy. During Checkout, enter the recipient’s information in the “Ship To” section and your information in “Bill To”. Select a membership level below to begin.    Click individual membership links for benefit information.   Corporate Membership Code: CRP Price: $1,000.00 Quantity in Basket: none   Louis Sullivan Society Membership Code: LSS Price: $1,000.00 Quantity in Basket: none   Limestone Membership Code: LMS Price: $500.00 Quantity in Basket: none   Terra Cotta Membership Code: TCT Price: $250.00 Quantity in Basket: none   Brick Membership Code: BRK Price: $100.00 Quantity in Basket: none   Tile Membership Code: TLE Price: $50.00 Quantity in Basket: none   Family Membership Code: FML Price: $35.00 Quantity in Basket: none   Basic Membership Code: BAS Price: $20.00 Quantity in Basket: none               Historic Preservation Commission Membership Information   ▪ If you are a staff member for or a commissioner on a historic preservation    commission, please contact us for special commission membership information. ▪ Phone (312) 922-1742 or email RichM@lpci.org. ▪ Click here for help with online sales.