The concert overture In Nature's Realm (Czech: V prírode, koncertní ouvertura), Op. 91, B. 168, was written by Dvorák in 1891. It is part of a "Nature, Life and Love" trilogy of overtures, forming the first part - "Nature". The other two parts of the trilogy are the Carnival Overture, Op. 92 ("Life") and Othello, Op. 93 ("Love"). The overture is scored for two flutes, two oboes, english horn, two clarinets, bass clarinet, two bassoons, four horns, twotrumpets, three trombones, tuba, timpani, triangle, cymbals and strings.