Zadar is a fascinating mixture of old and new, including the Church of Saint Donat built in the 9th century, the remains of a Roman forum from the 1st century, modern shopping streets and the famous sea organ. The sea organ is a musical instrument consisting of tubes located under a set of large marble steps along the waterfront. As boats go by, the waves rush into the pipes and create random but harmonic sounds. It was made by the architect Nikola Bašić as part of a project to rehabilitate the waterfront and was inaugurated on 15th April 2005. It’s a very popular venue for the locals at sunset.