http://www.philamuseum.org/ has been crawled 728 times going all the way back to December 5, 1998.

A crawl can be a duplicate of the last one. It happens about 25% of the time across 420,000,000 websites. FAQ
Jan
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January 5, 2011

1 snapshot

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January 12, 2011

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January 29, 2011

1 snapshot

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Feb

February 1, 2011

1 snapshot

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February 2, 2011

1 snapshot

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February 3, 2011

1 snapshot

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February 7, 2011

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February 9, 2011

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February 22, 2011

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February 26, 2011

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March 7, 2011

1 snapshot

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March 9, 2011

1 snapshot

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March 17, 2011

1 snapshot

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March 23, 2011

1 snapshot

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March 29, 2011

1 snapshot

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March 31, 2011

1 snapshot

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Apr
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April 10, 2011

1 snapshot

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April 12, 2011

1 snapshot

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April 14, 2011

1 snapshot

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April 15, 2011

1 snapshot

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April 23, 2011

1 snapshot

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April 27, 2011

1 snapshot

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April 29, 2011

1 snapshot

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May
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May 15, 2011

1 snapshot

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May 18, 2011

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May 25, 2011

1 snapshot

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Jun

June 1, 2011

1 snapshot

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June 6, 2011

1 snapshot

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June 8, 2011

1 snapshot

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June 13, 2011

1 snapshot

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June 15, 2011

6 snapshots

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Jul
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July 21, 2011

1 snapshot

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July 22, 2011

2 snapshots

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Aug
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Sep
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Oct
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Nov
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Dec
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Note

This calendar view maps the number of times http://www.philamuseum.org/ was crawled by the Wayback Machine, not how many times the site was actually updated. More info in the FAQ.