Every museum visitor needs a time slot for Teylers Museum, even if they have free admission (e.g. Museumkaart, BankGiro Loterij VIP-kaart, Vrienden).
It is not allowed to visit the museum when you have health complaints - a cold, a runny nose, sore throat, mild cough, temperature or fever (over 38◦C) and/or shortness of breath.
Purchased tickets will not be refunded. If you have health complaints on the day of your visit, it is possible to change the date and time of your tickets.