MAS is a striking building. Its design was inspired by a 16th century storehouse or 'Hanzehuis'. The outside consists of red stone from India and curved expanses of glass 6 metres high. MAS is short for 'Museum Aan de Stroom' or 'Museum At the Stream'. At the 9 floors inside are several museums, and the roof at the 10th floor offers a 360 degr panoramic view of the the city, river and port. More about that view later!