. >> paul wolford is one of architects. >> the greatest challenge is to honor the history of the building to preserve it and to renew it into something that is moaningful, not just for our times but for the next 50 to hundred years. >> natural light will replace lamps and fresh air will be circulated from outside. there will be modern twists, a floor put in decades ago will be replaced with glass to light the gallery below it. above that a soaring glass roof, not only it will protect the deteriorating facade but collect rain water. that garden will replicate the wetlands that once stood where the building is today. >> it will be one of the most environmentally historical land marks in the united states. >> first phase of planning was funded by the specially minted coins. >> after $13 million in the last of seven years we're now at the point to the final fund-raising and start construction of the building. >> another $35 million must be raised to open part of the building to the public. they hope to start construction by next summer and open by the end of 2013. >> still ahead, her work eth