Codex Alexandrinus is one of the four Great uncial codices and among the earliest and most complete manuscripts of the Bible. It is the oldest manuscript to use larger letters to indicate new sections, and it was the first manuscript of great importance and antiquity to be extensively used by textual critics.

It contains large lacunae in Acts 1:1-8:10 and in Hebrews 13:10-25.

Uncial 049 is a 9th-century Greek New Testament codex containing the Acts of the Apostles and the Epistles with numerous lacunae.