Here is a list of watercolor (watercolour) painting demonstrations of Venice that are on this site:
Narrow Canal Venice : This watercolor painting shows you how I paint a typical Venetian Canal. It covers how to crop a photo to achieve your painting design intention, how to paint the under wash of the sky, buildings and water. It covers how to paint textured walls and show atmospheric perspective. Drawing techniques are also discussed. The painting is finished off with strong reflections in the water.
Venice Sunset over Santa Maria Della Salute: Watercolor painting of a bright, dramatic sunset over Santa Maria Della Salute and the Venetian Customs House. Teaches how to paint a dramatic sky, gondolas and buildings with watercolor paints.
I hope you find the above watercolor demonstrations of use with your own watercolor paintings.