The portal Wielka Wojna: Polish archives and the Great War has been created by the Naczelna Dyrekcja Archiwów Pánstowych, the National Direction of Polish State Archives. Its core is an list of virtual exhibitions and/or activities in Polish state and city archives, organized by year, with 2014 on the top. You have to scroll down to find the most recent items. There is a page for new publications by Polish archives, a page for conferences and similar events, and a similar list for other projects, and also a page about themes concerning the First World War. Alas there are not for all items in these lists links. The portalsite can only be viewed in Polish.