A Bostonian through and through, Kronberg studied at the Boston Museum School, under Edmund Tarbell and Frank Weston Benson, earning a Longfellow Travelling Scholarship that took him to Paris and the Académie Julian. Like so many of his countrymen, he fell under the spell of the Paris of the Belle Epoque, studying under Jean-Paul Laurens and Jean-Joseph Benjamin-Constant. Almost inevitably he became enamoured with the works of Dégas and began to paint ballet and Spanish dancers in theatrical settings. Returning to Boston he was appointed instructor in the portrait class of Boston’s Copley Society of Art and fell under the patronage of Boston’s great art matron Isabella Stewart Gardner. After Bernard Berenson departed the Isabella Stewart Gardner Museum, Kronberg frequently returned to Paris to acquire art for their collection. After the Great War he left Boston, living for a time in New York, Algiers and Spain in the 1920s and retired to Palm Beach (Doesn’t everyone?). A decent cove, he was known for his philanthropy, which even extended to his competition – financing fellow painter Arthur Clifton Goodwin’s career for over fifteen years.