Pottermore has released a new interview with production designer, Stuart Craig.
The interview explores the Salem memorial:
In the middle of this vast space, there’s a huge memorial to the witches of Salem. J.K. Rowling wrote it into the script. The witches in the memorial are bronze sculptures, slightly larger than life. They stand in amongst the crowd, if you can imagine, so people can walk through the memorial and right by the witches.