Short answers, pulled from the story.
The Council of Liubech took place on the 19th of October 1097. This meeting gathered princes in Liubech to end years of bloodshed and civil war between Sviatopolk II, Vladimir II Monomakh, and Oleg I of Chernigov.
Vladimir Monomakh brought together Sviatopolk II, Vasilko Rostislavich, Davyd Sviatosvich, and Oleg I of Chernigov along with other unnamed princes. The council assigned Kiev, Turov, Pinsk, Pereyaslavl, Great Novgorod, Chernigov, Volhynia, and Peremyshl as distinct domains for each family based on established lines of descent.
This council broke the rota system known as lestvichnoe pravo that had been followed for two centuries. It replaced the rule where the oldest son took the throne with a system allowing each prince to receive his principality as a patrimonial domain for direct inheritance by immediate families.
Despite the new dispensation, feuding continued between the princes and conflicts arose after Sviatopolk's death in 1113. The blinding of David Igorevich by Vsevolod I of Kiev acted as a catalyst for further warring until Vladimir II organized the Council of Uvetichi on the 10th of August 1100.
A monument to the Lyubech Congress of Princes stands today in Ukraine. Gennady Ershov created this statue in 1997 to honor the event which remains one of the best documented princely meetings in history.