The annual public opening of the Royal Greenhouses in the Brussels district of Laken will take place from 17 April to 10 May. On Friday (20 March) tickets to visit the greenhouses went on sale. This year, the famous Winter Garden that is the largest of the greenhouses will not be open to the public due to restoration work. However, this year the Grand Gallery of Honour at Laken Castle will be open to the public for the first time.