🔢The Cistercians developed a secret decimal number system called Cistercian notation.
📚Cistercian notation was used primarily for page numbers and dates in books.
🗓️The Cistercian number system could represent all four-digit numbers from 0 to 9999.
🤫The Cistercians used their own sign language and had a vow of silence, leading to the development of their unique number system.
🧮Roman numerals and Arabic numerals are more widely known and used today, but Cistercian notation stands as a fascinating piece of history.