On view: in mostra, visitabile, aperta al pubblico

• If something such as a work of art is on view, it is shown in public for people to look at.
EX: A significant exhibition of contemporary sculpture will be on view at the Portland Gallery. PHRASE: usu v-link PHR

1 Your views on something are the beliefs or opinions that you have about it, for example whether you think it is good, bad, right, or wrong.
Washington and Moscow are believed to have similar views on Kashmir...
My own view is absolutely clear. What I did was right...
You should also make your views known to your local MP.
N-COUNT: usu with supp, oft N on n, N that

2 Your view of a particular subject is the way that you understand and think about it.
The drama takes an idealistic, even a naive view of the subject...
The whole point was to get away from a Christian-centred view of religion...

3 The view from a window or high place is everything which can be seen from that place, especially when it is considered to be beautiful.
The view from our window was one of beautiful green countryside...
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4 If you have a view of something, you can see it.
He stood up to get a better view of the blackboard...
N-SING: with supp, oft N of n, poss N

5 View refers to the way in which a piece of text or graphics is displayed on a computer screen. (COMPUTING)
To see the current document in full-page view, click the Page Zoom Full button.
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6 You use in my view when you want to indicate that you are stating a personal opinion, which other people might not agree with.
In my view things won't change...
PHRASE: PHR with cl

From The National Gallery website

Why is this painting not on display?It is the National Gallery's policy to display as many works as possible at any given time, and to avoid having paintings in long-term storage.

If a painting is off show, this is usually because it is in our Conservation Department, or on loan to another institution. Paintings may be displayed as part of a temporary exhibition, or may be in the process of being rehung following exhibition elsewhere. Rooms also occasionally close.

It is possible to telephone the Information Department (020 7747 2885) in advance to check if a particular painting is on display, but paintings are moved every day for the reasons given above - and no painting is guaranteed to be permanently in the same place. On arrival at the Gallery you can check a painting's location at one of the Information Desks.