Less than a year after taking over the day-to-day operations of Richard Meier’s eponymous architecture firm, managing principal Bernhard Karpf has quietly left. Karpf, who stepped up his role at the firm following an explosive New York Times story that revealed multiple allegations of sexual misconduct against Meier, stopped working for the company in July, a representative for the company confirmed on Friday. Karpf’s picture on the firm’s website, once the first featured on the …