Louis-Philippe died of an inflammation of the mucous membranes. According to his father, this was completely preventable. His funeral was held on 24 May 1843. He was buried in the Mausoleum of the Dukes of Brabant at the Collegiate church of St. Michael and St. Gudule. He is now burried in the chapel of Church of Our Lady of Laeken (Notre Dame de Laeken), near his family's tomb. This church did not exist at the time of his death. His mother died in 1850 and wanted to be buried at Laeken near the royal residence. Construction for the church began in 1854. It houses the royal crypt where the royal family is buried. A contemporary source recorded his passing: "The family of King Leopold are plunged into the deepest distress by the sudden death of the Duke of Brabant, the heir-apparent to the throne." He was followed as crown prince upon the birth of his younger brother, Leopold (Léopold Louis Philippe Marie Victor), who would later succeed their father as Leopold II, King of the Belgians. Leopold was the replacement child to Louis-Philippe.