Complex sentence: Some proceedings, especially in lawsuits between territories belonging to the Holy Roman Empire, took several hundred years, some of them were not brought to an end by the time it was dissolved in 1806, after the downfall of the Holy Roman Empire.
Split into simpler sentences: Some proceedings, especially in lawsuits between territories belonging to the Holy Roman Empire, took several hundred years. Some of the lawsuits were not brought to an end by the time it was dissolved in 1806, after the downfall of the Holy Roman Empire.