In the 19th century, the mostly unchallenged Polonization trend of the previous centuries had been met staunchly by then "anti-Polish" Russification policy, with temporary successes on both sides, like Polonization rises in mid-1850s and in 1880s and Russification strengthenings in 1830s and in 1860s. Any Polonization of the east and west territories (Russian and German partitions) occurred in the situation were Poles had steadily diminishing influence on the government. Partition of Poland posed a genuine threat to the continuation of Polish language-culture in those regions. As Polonization was centered around Polish culture, policies aimed at weakening and destroying it had a significant impact on weakening Polonization of those regions. This was particularly visible in Russian-occupied Poland, where the Polish culture fared worst, as Russian administration gradually became strongly anti-Polish. After a brief and relatively liberal early period in the early 19th century, where Poland was allowed to retain some autonomy as the Congress Poland puppet state, the situation for Polish culture steadily worsened.