Polish–Lithuanian Commonwealth

The Polish–Lithuanian Commonwealth – formally, the Crown of the Kingdom of Poland and the Grand Duchy of Lithuania and, after 1791, the Commonwealth of Poland – was a dual state, a bi-confederation of Poland and Lithuania ruled by a common monarch, who was both King of Poland and Grand Duke of Lithuania. It was one of the largest and most populous countries of 16th- to 17th-century Europe. At its largest territorial extent, in the early 17th century, the Commonwealth covered almost 400,000 square miles (1,000,000 km2) and sustained a multi-ethnic population of 11 million. Polish and Latin were the two co-official languages.
Second Northern War

The Second Northern War was fought between Sweden and its adversaries the Polish–Lithuanian Commonwealth (1655–60), the Moscow Tsardom (1656–58), Brandenburg-Prussia (1657–60), the Habsburg Monarchy (1657–60) and Denmark–Norway. The Dutch Republic often intervened against Sweden in an informal trade war but was not a recognized part of the Polish–Danish alliance.
Vilnius University

Vilnius University is the oldest university in the Baltic states, one of the oldest and most famous in Central Europe, preceded only by the universities of Prague, Kraków, Pécs, Budapest, Bratislava and Königsberg. Founded in the 16th century, it was the easternmost university in the world. Today it is the largest university in Lithuania.
Norman Davies

Ivor Norman Richard Davies is a British-Polish historian known for his publications on the history of Europe, Poland and the United Kingdom. He is a historian with special interest in Central and Eastern Europe and is UNESCO Professor at the Jagiellonian University, professor emeritus at University College London, a visiting professor at the Collège d'Europe, and an honorary fellow at St Antony's College, Oxford. He was granted Polish citizenship in 2014.
Timothy D. Snyder

Timothy David Snyder is an American author and historian specializing in the history of Central and Eastern Europe, and the Holocaust. He is the Richard C. Levin Professor of History at Yale University and a Permanent Fellow at the Institute for Human Sciences in Vienna.
Christopher Duggan

Christopher John Hesketh Duggan was a British historian and academic. He specialised in the political, social and cultural history of modern Italy. He began his career as a research fellow at Wolfson College, Oxford and then at All Souls College, Oxford. In 1987, he moved to the University of Reading where he remained until his death. He was Professor of Modern Italian History from 2002.