This is the 470th most frequent Polish word.
największych
The Polish word "największych" means "the biggest" or "the greatest" (plural, genitive).
'Największych' is used here in comparative form to denote the degree of greatness in artistic skill.
Anna jest jedną z największych artystek swojego pokolenia.
Anna is one of the greatest artists of her generation.
In this sentence, 'największych' relates to challenges, emphasizing their magnitude.
To jedno z największych wyzwań, jakie spotkałem w życiu.
This is one of the greatest challenges I've encountered in life.
Here, 'największych' modifies 'masters,' indicating their prominence or significance in the historical context.