Note: This calendar view maps the number of captures of http://www.unesco.org/new/es/communication-and-information/flagship-project-activities/memory-of-the-world/register/full-list-of-registered-heritage/registered-heritage-page-2/construction-and-fall-of-the-berlin-wall-and-the-two-plus-four-treaty-of-1990/, not how many times the site was actually updated.
Look Up URL in general Internet Archive web collection.