Call for Papers Kurt Gödel's unparalleled results in logic grant him a prominent place among logicians. Apart from extraordinary results in the theory of formal systems, he influenced research in set theory, non-classical logics, physical model of the universe, and in philosophy. For the conference, we welcome contributions to these topics especially from logicians, mathematicians, and historians and philosophers of logic. Contributions related to Tarski's work are also welcome. We cordially invite researchers working in a field relevant to the main topics of the conference to submit a short abstract of approximately 200 words and an extended abstract of at most a 1000 words (references included) through EasyChair at https://easychair.org/my/conference?conf=tkg2020. Accepted papers will be presented in 30 minute slots including discussion. Abstracts must be written in English; uploaded extended abstract must be in pdf format. Deadline for paper submission: Tuesday 15 October 2019. Notification of acceptance: 15 November 2019. Conference fee (includes booklet of abstracts, coffee breaks, lunch on Tuesday and conference dinner): EUR 100 Conference fee (for students: EUR 30). Conference website: http://physics.muni.cz/~godel/tribute2020/. Co-located events include awarding Kurt Gödel Prize for the excellent mathematician Petr Vopěnka<https://en.wikipedia.org/wiki/Petr_Vopenka> (1935 - 2015) and a public event Kurt Gödel in Brno<https://www.physics.muni.cz/~godel/tribute2020/cfp.php#> (detailed information postponed); for details, see the programme.