O.C. Tanner Renovates Historic Building TweetShareGoogle+Email The O.C. Tanner Company spent $24.5 million to renovate the historic Salt Lake City Main Library/former Hansen Planetarium. By Jennifer Napier-Pearce Listen Listening... / Salt Lake City, UT – A storied public building in downtown Salt Lake City is getting a new life as the flagship jewelry store of the O.C. Tanner Company. KUER's Jennifer Napier-Pearce toured the renovated structure and filed this report. TweetShareGoogle+EmailView the discussion thread.