What's the internal significance of "10 market st, san francisco"?

The example search for Google Maps has been "10 market st, san francisco" for as long as I can remember. I've always wondered if there's any special significance behind that particular address. I've asked a couple of Googlers I've come across, but no one knew. Maps shows it as at the corner of Steueart and Market. Just a random choice, or something meaningful in Google lore?
 
indifferent I’m intrigued
Inappropriate?
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