Mrkvička came to Plovdiv in 1881 after an invitation by the then-Eastern Rumelian government and worked as a teacher in the Cyril and Methodius high school, where he co-operated with the most important cultural figures in the city — Ivan Vazov, Konstantin Velichkov, Petko Karavelov, Petko Slaveykov.
Mrkvička's arrival in Plovdiv in 1881 was facilitated by the Eastern Rumelian government, and he began teaching at the Cyril and Methodius high school, where he collaborated with prominent cultural figures such as Ivan Vazov, Konstantin Velichkov, Petko Karavelov, and Petko Slaveykov.