In the frame of the Researchers' Night 2021, we were waiting for the science and research enthusiasts with the presentation of Bartos-Elekes Zsombor's representative publication entitled Mappæ Comitatuum Transylvaniæ, and with interactive guided tours at our Eötvös exhibition. Annamária Csókási's presentation Cultures torn apart – Cultural damage assessment with military technology in Nagorno Karabakh took place in our library, as well as a solo concert by Kata Borsos, featuring works by Biber, Telemann, Bach and Sándor Veress. We welcome all visitors to our library at the Autumn Festival of Museums with colorful programmes.