In the medieval times of knights, crusades and castles, there came a need for some sort of knighthood code to ensure order and success in the fighting profession. What came about was chivalry.
Chivalry, briefly defined, was the idealized aspect of knighthood. Some qualities that coincided with that ideal were honesty, loyalty and bravery.Though there is no official list of the chivalric 10 commandments, such as, "Remain faithful to thy pledged word" or "Always be the champion of the right and the good against injustice and evil" or "Love the country in which thou wast born."
Chivalry, however, was more than just words to live by. It was a knight's entire life. From conforming to specific personality traits to the way a woman was treated, a knight was forbidden to violate any of the chivalric codes.
Chivalrous courtly love was the structure for knights regarding the women who were a part of their lives. Courtly love was essentially to be kept a secret. The object of a knight's love had to be completely unobtainable, or it was not considered true love, meaning that she had to be a higher class rank than the knight, and she also had to be married. The only forms of contact - from afar - were love notes and letters.
Frustration and jealousy were also an original part of courtly love. If there was no jealousy, it was not love. If love was made public, it rarely endured. If a woman was easy to obtain, she was of little value. And if she was hard to get, she was of great worth.
Knights held their chivalric code in very high respect. When a new knight was given the position, he was required to be sworn in and to take an oath that he would live by the chivalric code.
Today's definition of chivalry is considerably different from what it was first envisioned to be. Chivalry inevitably evolved and became modified to the state we see it in now.