Last date for submission of paper: unknown; Contact person: Pawe? ?awniczak; Over the years, the Seminar evolved into a recognized international conference and a forum of presentation of recent results, unconstrained discussions and initiating joint studies. The Seminar results not only in scientific integration but also in close cooperation and friendship.We invite you cordially to the XXIV Polish-Czech Seminar on Structural and Ferroelectric Phase Transitions on May 25-29, 2020 to the Karczowiska village.