At the end of the 19th and beginning of the 20th century experts underlined the vital meaning of light, greenery and kind of materials in equipping new school buildings. School buildings were surrounded by greenery which gave them shade and protected them from wind. Together with introducing nature as a subject into the teaching program small botanical gardens were designed near buildings. Gym classes were also very important. Sports grounds an playgrounds for smaller children became an inseparable element of schools. A well with drinking water was usually placed next to them.