1500–1536). With the execution of her mother in 1536, on charges of adultery and treason, the young Elizabeth was declared illegitimate, as her elder half sister Mary had been before her. Both daughters were finally restored to the succession in 1544, although they were preceded in line to the throne by Edward VI (1537–1553), Henry's first and only son born to his third wife, Jane Seymour (1508/1509–1537). After Edward died, aged just 15, Mary became Queen of England. Her half sister, Elizabeth, was next to come to the throne, following Mary's death in 1558. Elizabeth faced a great deal of opposition, including that of the Scottish reformer John Knox (c.1514–1572), who viewed women as unfit to rule. Similarly, John Aylmer (1520/1521–1594), Bishop of London was of the opinion that the country would be governed, not so much by Elizabeth, as in her name. However, Elizabeth left no doubt that it was she who ruled, although tensions between her own ambitions and those of her subjects became a theme of her reign.