When I was in Helsinki late last year I was disappointed to find the main Marimekko shop on Esplanadi closed for renovation.
I returned earlier this year and was very pleased to see the newly renovated shop. It is not quite as big as before, and it is no longer on Esplanadi, but further down Mikonkatu.
It can also be entered via the Kampi shopping centre. There are several other places to buy Marimekko in Helsinki, but this one has always been my favourite.