Encyclopedy Britannica
The synoptic problem of the gospels
the Gospels of Matthew, Mark, and Luke in the New Testament. Since
the1780s, the first three books of the New Testament have been called
the Synoptic Gospels because they are so similar in structure, content,
andwording that they can easily be set side by side to provide a
synoptic comparison of their content. (The Gospel of John has a
different arrangement and offers a somewhat different perspective on
Christ.) The striking similarities between the first three Gospels
prompt questions regarding the actual literary relationship that exists
between them. This question, called the Synoptic problem, has been
elaborately studied in modern times.