There are many wonderful paintings in the Royal Collection. To create these artworks, artists will often spend a long time preparing before they start on the final painting. They may do sketches to work out exactly how they would like the picture to look.

In between the original sketches and the final paintings, artists sometimes make changes.

These pictures, by Johan Joseph Zoffany, show George III and his wife, Queen Charlotte, with their six eldest children. The preparatory sketch is on the left and the final painting is on the right.

Compare the preparatory sketch with the final painting – what differences can you spot between the two? Why do you think the artist made the changes you found? Are there any other changes you would have made?