How these pages are made
A museum is researched before it is listed: a photograph of the building under a free licence, proof the institution is open, the admission and the hours from its own pages with the date we read them, and the objects in this archive that are held there. The methodology.
Why the dates
A fee changes with the calendar year and opening hours change with the season. Every figure here carries the day we last confirmed it, and past six months the page says so rather than pretending nobody needs to check.