Gallery of galleries?

For my galleries I want to use the image module. Now I wonder if it is possible to create a structure like:

Pictures
-- 2007
-- -- Event 1
-- -- Event 2
-- -- Event 3
-- 2006
-- -- Event 4
-- -- Event 5
...

Pictures should show a kind of summary. Only Links and Previews for

-- 2007
-- 2006
...

should be visible and the content automatically updated (124 pictures in 2 galleries).

Is that possible?