The project “www.muzeach” („In museums”) aims to provide public access to digital resources of five museums maintained or co-maintained by the Ministry of Culture and National Heritage. These include: Museum of King Jan III’ Palace at Wilanów (project leader), POLIN Museum of the History of Polish Jews, National Museum in Lublin (formerly Lublin Museum), National Museum in Szczecin and Castle Museum in Łańcut. The project provides for the development of infrastructure for the digitisation and sharing of digital resources of the museums. The main objective is to make different resources of various kinds available in one place, in a simple form, and for free – and thereby to improve access to resources offered by participating institutions in digital form. The project complies with the specific objective of the Operational Program Digital Poland: digital availability and usefulness of public sector information. Cultural resources of museums as national cultural institutions fit the definition of public sector information. Project co-financed from European Funds and by the Ministry of Culture and National Heritage. The project is implemented under the Operational Programme Digital Poland for the years 2014-2020, Priority Axis 2 “E-government and open government,” Action 2.3 “Digital availability and usefulness of public sector information,” Sub-action 2.3.2 “Digital availability of culture resources.”