Lydia Emilie Florence Jannsen (b. Vändra, Estonia ,1843 – d. 1886, Kronstadt, Russian Empire), known by her pen name Lydia Koidula, was an Estonian poet. In 1873 she married Eduard Michelson, an army physician, and moved to Kronstadt, the headquarters of the Russian navy near St. Petersburg. Koidula lived in Kronstadt for 13 years but despite spending her summers in Estonia, she never stopped feeling inconsolably homesick.
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