then I have the following question: for how long after death does this control remain? After all, there are quite unpredictable cases. Besides, I assume that there are some laws defining such cases.
as I recall, content cannot be used without permission from the creation date up to 70 years after the death of the author. It is supported by Italian, British and American laws. By the way, another variant of the so-called fair use is possible.
as I recall, such exclusive rights are called economic or generic rights. As such, economic rights contain permission to publish and reproduce, as well as transfer to a particular work.