I
Light
Fifty lux on works on paper, a hundred and fifty on paintings, and eleven days of opening a year. The store is the default state; display is the exception.
Winterthur / 411 works / open eleven days a year
Postwar abstraction, bought slowly between 1961 and 1994 by two people who never once agreed in public.

Elsa and Martin Weiss bought their first painting in 1961 with money set aside for a car, and their last in 1994, three weeks before Martin died.
They collected against the market rather than with it: the unfashionable years of artists who later became fashionable, and a stubborn number of artists who never did. Roughly a third of the collection is by people with no monograph.
Nothing has been sold. Nothing will be. The foundation deed forbids deaccession in terms a lawyer described, admiringly, as unhelpfully absolute.
North light, no artificial source. Closed on days when the meter reads under 180 lux at noon.
One bench. The hang changes twice a year and is never announced in advance.
Sculpture only. The floor is the original 1962 screed and it is not to be walked on in heels.
Not open. Researchers may request a viewing of up to four works, in writing, twice a year.


Twelve visitors per day, ninety minutes each, allocated by ballot. Entry is free. There is no shop, no café, and no photography.
The full catalogue is on paper, in one copy, in the reading room. We have been meaning to digitise it since 2009.

Not policy for its own sake. Each of these is the reason something has survived seventy years.
I
Fifty lux on works on paper, a hundred and fifty on paintings, and eleven days of opening a year. The store is the default state; display is the exception.
II
Nineteen degrees, fifty per cent, moved slowly. The plant is oversized so it never has to work hard, which is also why it has never failed.
III
Two people, cotton, no jewellery, and a written condition report before and after every movement, including the ones inside the building.
Treatments carried out since 2015, listed because the deed requires it and because researchers ask.