Answer:
The expression "por eso muchas virgenes del rosario se perdieron" refers to the fact that something very serious happened due to the inattention of a person or something happened that they did not realize.
Explanation:
The expression was taken from a fragment of writing the poet Mario de Andrade (Writer of poems of hardship and development), in the writing a statue of the virgen del Rosario was stolen because nobody paid attention to it in due course.