Complex sentence: During his hiatus from painting Dannat spent much of his time touring Europe studying the techniques of the great masters while remaining active in artistic circles in Paris where he served at one time as the president of the Society of American Painters.
Split into simpler sentences: During his hiatus from painting Dannat spent much of his time touring Europe studying the techniques of the great masters. He also remained active in artistic circles in Paris where he served at one time as the president of the Society of American Painters.