The Memorial Square of Lydia Koidula and her father Johann Voldemar Jannsen was opened in the Ülejõe Park in Tartu on 3 August 2018. In 1863, their family moved to Tartu, where the father and daughter issued the Estonian newspaper Eesti Postimees, founded the theatre company Vanemuine, and in 1869, organised the first song festival in Estonia. Both were promoters of the Estonian national movement and cultivators of Estonian-language culture.