In March of 2020 Merel decided to help protect the statues in The Hague against the virus. She was partly inspired by masked statues she saw on a trip through Japan. She also wanted to cheer up the city a little bit during the first lockdown. More and more masks appeared, and are still appearing... Maybe, if you are lucky you wil spot one.
An account of all the masks and statues and media coverage can be found here: