“Colloquium in memoriam of Kazimierz Twardowski” was an annual conference initiated by the well-known researcher of the Lviv-Warsaw school – Borys Dombrovski, which regularly took place in Lviv in 1988-2018 on the anniversary of the death of Kazimierz Twardowski – 11th of February. From 2003, the main organizer of the Readings was the Chair of Philosophy of the Lviv Polytechnic, while the organizational committee was headed by Professor Viktor Petrushenko. K. Twardowski Philosophical Society of Lviv co-organized the 29th Colloquium in 2017 and was the main organizer of the 30th Colloquium in 2018. The topics of Colloquium were not limited to the philosophy of the Lviv-Warsaw School, but spanned the widest range of current philosophical issues.