NEW YORK CITY — Monday Properties, along with joint venture partner Whitehall Street Real Estate Funds, has purchased 230 Park Avenue in Manhattan, New York City, from Istithmar. The 34-story building, which is located at E. 45th and E. 46th streets at the base of Park Avenue, is set to undergo an expansive multi-year capital improvement program. Current tenants include ING, Tokio Marine Fire & Insurance Co., Bear Stearns & Co. and HSH Nordbank. Anthony Westreich of Monday Properties represented the company in-house in the transaction. The sale price was undisclosed.