Assessment of the air quality (NO2, SO2, O3 and particulate matter) in the Plantin-Moretus Museum/Print Room in Antwerp, Belgium, in different seasons of the year

► We compare indoor and outdoor air quality in one of the museums in Antwerp, Belgium. ► Our results base on 4 seasonal sampling campaigns performed within a year. ► We found differences in indoor air quality depending on external conditions. ► Tourist activity was an important factor influencing the indoor environment quality. ► Protective role of the museum against fine particulate matter was not sufficient.