ANTWERP Along the pavements of Theaterbuurt, Antwerp’s Latin Quarter, a cacophony unravels. Assistants fiddle with displays in the storefronts of avant-garde designers, pedestrians click their shoes across busy crossings, and outside independent cafes, baristas unstack chairs in preparation for the day ahead. Then the car diverts left. The urban scenery disappears, leaving a hedge-lined driveway, flanked by the 15th-century frame of a former monastery in its stead. Botanic Sa