The Illinois legislature repeals Nauvoo's city charter. Young responds on 7 Apr. by renaming the community "The City of Joseph." On 16 Apr. he uses the general incorporation law of Illinois to protect the temple, Nauvoo House, and other public buildings by creating a one-mile-square Town of Nauvoo.
[Quinn, D. Michael, The Mormon Hierarchy: Origins of Power, Appendix 7: Selected Chronology of the Church of Jesus Christ of Latter-day Saints, 1830-47, http://amzn.to/origins-power]