To some extent, the significance and use of a historic
structure or site determines the kinds of access that can be
provided. The objective is to provide independent access for all
visitors and users of the historic 'resource, while interfering as
little as possible with its historic and architectural character.
If the physical changes needed to create that kind of access are
destructive to the resource, alternatives may be considered, such
as providing special aids or staff assistance or, in the case of
museums, special interpretive or informational programs.
Figure 3-3. The Planning Process for Handicapped
Access to Historic Buildings.
Robert P. Beden in Access to Historic Buildings for the
Disable d, U.S. Department of the Interior)