Poet
Constantijn's poetry covered many genres: love poems, elegies, occasional verse and short epigrams as well as long works such as Hofwijck and Zeestraet. His most important poetry publications are Batave Tempe, a poem in praise of the street Voorhout in The Hague; ’t Costelick Mal, a mildly satirical poem on fashion; and the collections Otia in 1625 and Korenbloemen in 1658.
Composer
Constantijn was a gifted musician who was able to play the lute, spinet, harpsichord, organ, viola da gamba and guitar. He also composed almost 900 musical works, most of which have sadly been lost. His beautiful and restrained Pathodia sacra et profana occupati ('Sensitive sacred and worldly songs written by an occupied man') are still performed regularly.