The establishment of the Museum of the Origins of the Polish State in Gniezno, one of the two organizers of the KMP, is related to archaeological research in the first capital of Poland, including post-war millennium research. The idea was born to collect, store and display the excavated artefacts in a specially established museum. The current headquarters of the facility was commissioned in 1973; it is a beautiful example of modernism, but also the first building in Poland built from scratch as a museum. It is the only museum in Poland (and perhaps in the world) that is permanently connected with a high school. Initially, it was planned to build an entire educational, tourist and entertainment complex as a monument to the state's millennium. To this day, the inhabitants of Gniezno call the building a ‘monument’. The museum popularizes knowledge about the earliest history of Poland, the later history of the Gniezno region, but also the early Middle Ages in general. It is known for its unconventional approach to promoting history and activity on the Internet. It serves as a platform between scholars and anyone interested in the early Middle Ages.

The Institute of European Culture in Gniezno (IKE) is one of the organizers of the Congress. IKE is a branch of the University of Adam Mickiewicz University in Poznań, which evolved from the Gniezno College of Europe founded in 2000. Today, IKE is a place open to everyone, a center for meetings and discussions, a space for scientific and cultural events: conferences, projects, lectures, workshops and festivals. This place is extremely important for the local community and strongly rooted in Gniezno's identity. The institute is created by people with passion. These are research and teaching, administrative and economic employees. Among them, there are 21 people who conduct interdisciplinary research on cultural changes taking place on the Old Continent. Their scientific activity translates into the implementation of education in practical fields of undergraduate and graduate studies: European communication, cultural design and management in local administration.

The Congress is co-organized by the Standing Committee of Polish Medievalists (SKMP) a body of representatives of Polish scientific centers conducting research on the Middle Ages. When this institution was established in 2003, it consisted of approximately 50 medievalists, headed by prof. Wojciech Fałkowski. The main task of SKMP is to integrate Polish medievalists from various disciplines, which is to be achieved, among others, by: organization of Congresses of Polish Medievalists, i.e. their true celebration. The congresses are a platform for exchanging research experiences and the latest achievements of representatives of various disciplines researching the Middle Ages, i.e. historians, archaeologists, art historians, philologists, religious studies experts, but also representatives of natural sciences and historical re-enactors. Another initiative implemented by SKMP is the awarding of the "Lux et Laus" medal for exceptional achievements in research on the Middle Ages. Since 2006, it has been awarded to 29 researchers, mainly Polish, but also foreign, including: Witold Hensel, Gerard Labuda, Jacques Le Goff, Teresa Michałowska, Karol Modzelewski, Eduard Mühle, Henryk Samsonowicz, Wojciech Fałkowski and Hanna Kóčka-Krenz - chairwoman of the Presidium of the Scientific Committee of the Congress 2025.