The Sea Organ in Zadar was designed by the architect Nikola Bašić. It was part of a project to redesign Zadar's new city coast, called Nova rive, and it opened on April 15, 2005. The article names no client and no style. It calls the work an architectural sound art object and an experimental musical instrument.
Sea waves push air through polyethylene tubes hidden under a set of white marble steps that lead down to the water. A resonating cavity shapes the notes. The result is described as somewhat random but harmonic sounds. The article gives no dimensions.
In 2006 it shared the prize at the fourth European Prize for Urban Public Space. The steps are public, and the article says tourists and locals both gather there. The notes change with the weather and the size of the waves.

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