Complex sentence: In the 1870s, however, several publications corrected the dating and within a few decades 1535 became the generally accepted date and so was the painting's historical context with the publication of the censored manuscript from the Vasa Chronicle in 1909.
Split into simpler sentences: In the 1870s, however, several publications corrected the dating and within a few decades 1535 became the generally accepted date. The painting's correct historical context was laid bare with the publication of the censored manuscript from the Vasa Chronicle in 1909.