What do starchitects and bowling alleys have in common?  Not much usually, except in the case of this issue’s Monthly Gem: 21 E 12th Street.  A beautiful 23-story tower is on the rise on the site of the Greenwich Village Bowlmor Lanes, which operated in the space since back in 1938, making it the longest continuously running alley on the East Coast. Billy Macklowe acquired 110 University Place back in 2012 (which also housed a parking garage).  The building, designed by Annabelle Selldorf, is scheduled to begin sales in the Fall of 2016, with pricing largely matching the expectations set by the neighborhood and quality: one-bedrooms starting at $2.35 million; two-bedrooms at $3.95 million; three-bedrooms at $5.45 million; four-bedrooms at $8.25 million; and a selection of townhouses and penthouses at $10.5 million and higher.  As per the NYT, “the apartments have been designed so that each will be a corner unit, which allows for more natural light, especially since the tower is set back from the street, said Ms. Selldorf, who recently was given a medal of honor by the New York chapter of the American Institute of Architects.”  The amenities of the 52 expected units will include a basement parking garage, a residents’ lounge area that is attached to an outdoor terrace and a children’s playroom.