Complex sentence: Eyrbyggja Saga chapter 50 The author explains that Snorri Goði permitted the construction of Christian churches around Snæfellsnes, which was the same summer that Snorri declared Christianity was the official religion of Iceland, although it is unclear how many Norsemen actually converted from Norse paganism to Christianity.
Split into simpler sentences: Eyrbyggja Saga chapter 50 The author explains that Snorri Goði permitted the construction of Christian churches around Snæfellsnes, which was the same summer that Snorri declared Christianity was the official religion of Iceland. Although, it is unclear how many Norsemen actually converted from Norse paganism to Christianity.