Simplify the following text for a Grade 8 native English-speaking person.
Original: Although Silla was founded earlier than Goguryeo and Baekje which coexisted with Silla during that time , it took more time for Silla to build firm structure form of country than those .
Simplified: Buddhism in Silla was , more so than in the case of Baekje and Goguryeo , an officially sponsored faith .