Mozart Siblings' Health Crisis on European Tour: A Struggle for Recognition and Stability

In late 1765, Wolfgang Amadeus Mozart and his sister Maria Anna “Nannerl” Mozart fell seriously ill while staying in The Hague during their family’s extended Grand Tour of Europe. The Mozarts had arrived in the Dutch Republic after leaving England in August 1765. By autumn, both children developed severe symptoms described in family correspondence, and historians commonly identify the illness as typhoid fever. Their father, Leopold Mozart, suspended performances while they recovered, creating financial strain because the family relied heavily on concert income. Nannerl became ill first, followed soon after by Wolfgang. The illnesses were prolonged, and the family remained in The Hague for several months. Leopold documented the situation in letters, noting the seriousness of their conditions and the uncertainty surrounding their recovery. During this period, the Mozarts were unable to travel or perform, halting their touring schedule. The stay extended into early 1766 as both children gradually regained strength. By January 1766, Wolfgang and Nannerl had improved sufficiently to resume musical activity. They later performed before members of the Dutch court, including Princess Caroline and Prince William V. The health crisis in late 1765 therefore interrupted the Grand Tour and delayed the family’s return journey. Despite the setback, the Mozarts continued touring later in 1766 before returning to Salzburg.