M.A. degree from the Institute of History, University of Warsaw, 2010; doctorate cum laude at the said Institute in 2017. Employee of the Museum of Warsaw since 2010, and of the Institute of History since 2017. Editor in chief of the yearbook Almanac of Warsaw. Member of the Svenska Historiska Föreningen, European Association for Urban History (EAUH), The International Council of Museums - ICOM, Polish Society for the Study of 18th Century. Research interests: history of cities, economic history, Swedish war- booty looted from the territory of the Polish-Lithuanian Commonwealth and Polish-Swedish relations in the Modern Era.
Main publications:
- K. Wagner, P. E. Weszpiński, Plan Warszawy 1768 Georges Louis le Rouge, Muzeum Warszawy: Warsaw 2014 (KLIO 2014 in the Varsaviana category, 1st Prize at the 9th edition of Wierzba—Museum Events in Mazovia)
- K. Wagner, K. Zwierz, P. Piechocki (eds.), Skąd się biorą warszawiacy? Migracje do Warszawy w XIV-XXI wieku, Muzeum Warszawy: Warsaw 2016 (Sybilla 2016 in the research projects category)
- Did Large Cities Exist in the 17th Century Polish-Lithuanian Commonwealth? A Definition Attempt, "Codrul Cosminului" 2017, vol. 23, issue 1, p. 139-150.
- Tax Registers as a Tool for the Analysis of Wealth Inequalities in Selected Towns of the Polish-Lithuanian Commonwealth in the 17th Century and the beginning of the 18th Century. Overview and Research Problems, „Codrul Cosminului” 2016, t. 1 (22), s. 7–18.
- Szwedzkie zdobycze z Rzeczpospolitej. Zarys problematyki, w: „W hetmańskim trudzie”. Księga Pamiątkowa ku czci Profesora Jana Wimmera, red. Z. Hundert, M. Wagner, Oświęcim 2017, s. 121-137.
- The Battle of Narva 1700, in: Great Northern War Compendium, ed. Steve Kling, St. Louis, Missouri 2015, vol. 1.
- „Potop” a Wielka Wojna Północna w Warszawie w świetle rejestrów podatkowych – przyczynek do porównania dwóch szwedzkich okupacji, „Saeculum Christianum” 2013, t. 20, s. 145-159.