Complex sentence: By the year of 1525, the Tudor dynasty had been on the throne for forty years, what the dynasty had to show for itself was strong government, and end to the war of the Roses, and a beloved King on the throne.
Split into simpler sentences: By the year of 1525, the Tudor dynasty had been on the throne for forty years. What the dynasty had to show for itself was strong government, an end to the war of the Roses, and a beloved King on the throne.