When and where did the Anti-Masonic Party hold its national convention?

The Anti-Masonic Party held its national convention in Baltimore, Maryland, in September 1831. This convention was significant as it marked the first time an American third party convened nationally to nominate a presidential candidate and present a platform of principles. The party was formed out of public outrage following the 1826 disappearance of William Morgan, who allegedly intended to expose Masonic secrets.1