The Editio Regia which Estienne, that it was edited by in 1550 at Paris worked on one of the most important printed editions of the Greek New Testament in history making it the first Greek Testament that has a critical apparatus, an organized system of notations to represent, in a single text, the complex history of that text in a concise form, which is one of the most important printed editions of the Greek New Testament in history.
It is one of the most important printed editions of the Greek New Testament in history, the Textus Receptus. It was edited by Estienne in 1550 at Paris. It is the first Greek Testament that has a critical apparatus. A critical apparatus (Latin: apparatus criticus) in textual criticism of primary source material, is an organized system of notations to represent, in a single text, the complex history of that text in a concise form useful to diligent readers and scholars. 
