When published in 1716, Antonio Vivaldi’s Sonatas, op. 5 were declared as the second part of his op. 2. + The entity contains four solo sonatas and two trio sonatas, which was rather unusual at that time. + The Baltic Baroque, under the direction of Grigori Maltizov, present, most surprisingly, the first recordings of these works to be undertaken and the first on period instruments. + There is a multitude of reasons for their non-representation on record, all of which falling into areas of origin, authorship and relations in music.