On 10th-11th June 2021, the Institute of History, Siedlce University of Natural Sciences and Humanities organized an online scientific conference „The world hidden in archives”. One of the members of the Organizing Committee was a doctoral student Rafał Borychowski in the discipline of history, who gave lectures at the conference: „Reconstruction of the past reality based on the church visitation documents from the 16th to 19th century on the example of the parish under the invocation of St. Stanislaw Bishop and Martyr in Siedlce" and „The image of the world seen through the prism of the documentation in the institutions with separated archives". Anna Kłoś, another doctoral student in this discipline who participated in the conference, delivered a paper „The everyday life of the inhabitants of Łosice in the years 1944-1975 on the basis of archival materials”.