Sister (Spanish: Sor) Tadea de San Joaquín (c. 1750–1827) was a Carmelite nun and writer of the Chilean Colonial period who wrote Catholic confessional ballad about the great flood of 1783.
[3] In 1783, a flood forced the nuns of the convent to flee and Sister Tadea was encouraged to write a ballad about the events to her confessor who was away.
[2] The ballad is 516 verses in octosyllabic meter and demonstrates that she was familiar with both Baroque and epic poetry.
[4] Initially printed with an anonymous author, her identity was not revealed until 1850, when José Ignacio Eyzaguirre Portales [es] ecclesiastical historian of Chile, identified her and her work.
[5] Sister Tadea served as superior of the monastery three times and composed verses until her death in 1827.