In 1906, after a short, rather uneventful stay in Paris at the beginning of the year, Sibelius spent several months composing in Ainola, his major work of the period being "Pohjola's Daughter", yet another piece based on the "Kalevala". Later in the year he composed incidental music for "Belshazzar's Feast", also adapting it as an orchestral suite. He ended the year conducting a series of concerts, the most successful being the first public performance of "Pohjola's Daughter" at the Mariinsky Theatre in St Petersburg.