Richard Moe, who oversaw a major shift in the culture and financing of the National Trust for Historic Preservation, is stepping down after 16 years as the organization’s president, reports The Washington Post.

Citing a need for generational change, Mr. Moe announced on Tuesday that he will leave the post as soon as a replacement is found. He is the longest-serving president in the trust’s 60-year history.

Soon after taking office in 1993, Mr. Moe spearheaded the successful fight to prevent Disney from opening a massive theme park near Manassas National Battlefield Park in Virginia. In subsequent years he shifted the trust’s financial focus, reducing its dependence on federal funds and leading two major capital campaigns that swelled its endowment from $33-million in 1993 to $232-million in 2007.

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