The spread of Christianity had several stages and it is still an open research question. In older publications, the first organized missions were attributed mainly to Hiberno-Scottish missionaries, but modern works are more sceptical about their direct influence. The territory of Great Moravia was originally evangelized by missionaries coming from the Frankish Empire or Byzantine enclaves in Italy and Dalmatia from the early 8th century and sporadically earlier. Traces of an Aquileia-Dalmatic mission are found in Great Moravian architecture and language. Northern-Italian influence is assumed also for golden plaques with Christian motifs from Bojná (probably from a portable altar), which belong to the most important Christian artefacts dated prior to the mission of Saints Cyril and Methodius. Especially after the defeat of the Avars at the end of the 8th century, Frankish missionaries became the most important part of organized missions. The first Christian church of the Western and Eastern Slavs known from written sources was built in 828 by Pribina in Nitra and consecrated by Bishop Adalram of Salzburg. Most of the territory was Christianized until the mid-9th century. Despite the formal endorsement by the elites, Great Moravian Christianity was described as containing many pagan elements as late as 852. Grave goods, such as food, could be found even in church graveyards. The Church organization in Great Moravia was supervised by the Bavarian clergy until the arrival of the Byzantine missionaries Saints Cyril and Methodius in 863.