The fortieth edition of the European Heritage Days 2023 will take place on Saturday 21 and Sunday 22 September 2024 on the themes of “Heritage of routes, networks and connections” and “Maritime heritages”.. On this occasion, admission to the garden will be at the reduced rate of €4 (instead of €6 or €5). Other preferential rates apply. The garden will be open at the usual times (10 a.m.-6 p.m. non-stop).