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 a 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, a 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.