In 1984 Sahanovič graduated from the Maxim Tank Belarusian State Pedagogical University in Miensk. Beginning in 1986 he became an active member of the democratic opposition in Soviet Belarus. In 1989 Sahanovič obtained a PhD degree in history from the Institute of History, National Academy of Sciences of Belarus, where he worked as a researcher between 1984 and 2005. His employment was terminated, in the course of the politically-motivated purge of historians and social scientists, whose research did not follow the government's official line. Sahanovič moved to the European Humanities University, then still based in the Belarusian capital of Miensk. The EHU ceased operating in Belarus in 2004. In 1994 Sahanovič founded the journal Belaruski Histaryčny Ahliad/Belarusian Historical Review, and since then has served as its Editor-in-Chief. At the same time, he was also a member of the editorial board of another new learned journal, devoted to Belarusian studies, namely, Беларусіка Belarusika/Albaruthenica, as founded and edited by the leading Belarusian philologist and historian Adam Maldzis. Sahanovič works and does research at the EHU, Vilnius, Lithuania, and at the University of Warsaw in the Center for Belarusian Studies, Center for East European Studies. In 2018 Sahanovič obtained a Habilitation degree in history from the University of Warsaw.
Awards
For his research Sahanovič received a Belarusian PEN Club's Francišak Bahuševič award in 1995, and six years later, in 2001, an award conferred by the Polish journal Przegląd Wschodni.
Books
Айчыну сваю баронячы: Канстанцін Астрожскі Ajčynu svaju baroniačy: Kanstancin Astrožski . 1992. Мiensk: Navuka i technika, 62pp..
Войска Вялікага княства Літоўскага ў XVI—XVII стст Vojska Vialikaha kniastva Litoŭskaha ŭ XVI-XVII stst . 1994. Miensk: Navuka i technika, 79pp..
Невядомая вайна, 1654—1667 Nieviadomaja vajna, 1654—1667 . 1995. Miensk: Navuka i technika. 144pp..
With U. Arlov Дзесяць вякоў беларускай гісторыі, 862—1918 Dziesiać viakoŭ bielaruskaj historyi, 862—1918 . 1999. Vilnius: Nasha Buduchynia. 223pp..
Нарыс гісторыі Беларусі ад старажытнасці да канца XVIII ст. Narys historyi Bielarusi ad staražytnasci da kanca XVIII st. 2001. Miensk: Encykłapiedyks. 411pp..
Bibliografia białoruska, 1992-1994 . 2002. Warsaw: Studium Europy Wschodniej UW, 240pp.
Źródła pamięci historycznej współczesnej Białorusi. Powrót zachodniorusizmu . 2006. Lublin: Instytut Europy Środkowo-Wschodniej, 29pp.
Грунвальд у беларускай гісторыі: спроба разбору палітычнага міфа Hrunvald u bielaruskaj historyi: sproba razboru palityčnaha mifa . 2015. Miensk: Medysont. 414pp.
Research
. Retrieved 2018-07-12
Lectures
. 2012. "Беларусь як акупаванае грамадства" . Retrieved 2018-07-08