<page_title> List of Grand Prix motorcycle racing World Champions by year </page_title> <section_title> List </section_title> <table> <cell> 1957 <col_header> Year </col_header> <col_header> 1949 </col_header> <col_header> 1950 </col_header> <col_header> 1951 </col_header> <col_header> 1952 </col_header> <col_header> 1953 </col_header> <col_header> 1954 </col_header> <col_header> 1955 </col_header> <col_header> 1956 </col_header> </cell> <cell> Italy Libero Liberati (Gilera) <col_header> 500cc </col_header> <row_header> 1957 </row_header> </cell> </table>
In 1957, Libero Liberati was the Grand Prix motorcycle racer World Champion in 500cc.