Did you know that in the 17th century they didn't have envelopes at all? Letters were skillfully folded in a variety of ways so that the message was protected from weather, wind and prying eyes! Learn letter art from the 17th century: write or draw with a quill; then beautifully fold the letter and seal it with a wax seal. Just like Johan de Witt did!
By the way, this is not all: Johan often used secret writing. He came up with all kinds of codes himself. Get inspired and write or draw a highly secret letter, unreadable for friends, girlfriends, grandparents and perhaps most importantly: your parents.
Tickets cost €5.00 and can be reserved at: https://www.dordrechtsmuseum.nl/nu-te-zien-en-te-doen/brievenkunst/