sion, and instead declared as his heir Lady Jane Grey, granddaughter of Henry VIII's younger sister Mary Tudor, Queen of France. Jane was proclaimed queen by the privy council, but her support quickly crumbled, and she was deposed after nine days. On 3 August 1553, Mary rode triumphantly into London, with Elizabeth at her side. The show of solidarity between the sisters did not last long. Mary, a devout Catholic, was determined to crush the Protestant faith in which Elizabeth had been educated, and she ordered that everyone attend Catholic Mass; Elizabeth outwardly conformed. Mary's initial popularity ebbed away in 1554 when she announced plans to marry Philip of Spain, the son of Holy Roman Emperor Charles V and a Catholic. Discontent spread rapidly through the country, and many looked to Elizabeth as a focus for their opposition to Mary's religious policies. In January and February 1554, Wyatt's rebellion broke out; it was soon suppressed. Elizabeth was brought to court and interrogated regarding her role, and on 18 March, she was imprisoned in the Tower of London. Elizabeth fervently protested her innocence. Though it is unlikely that she had plotted with the rebels, some of them were known to have approached her. Mary's closest confidant, Emperor Charles's ambassador Simon Renard, argued that her throne would never be safe while Elizabeth lived; and Lord Chancellor Stephen Gardiner, worked to have Elizabeth put on trial. Elizabeth's supporters in the government, including William Paget, 1st Baron Paget, convinced Mary to spare her sister in the absence of hard evidence agai