This chapter provides a comprehensive overview of contemporary anatomical research, transforming our understanding of knee ligament anatomy. The objective is to present recent discoveries that challenge traditional perspectives and unveil the complexities of ligamentous structures within the knee joint. An in-depth understanding of knee anatomy is essential, particularly in the context of managing sports injuries, requiring a nuanced approach that considers individual predispositions, healing potential, and patient expectations. When surgery is considered, the cardinal principle prioritizes anatomical precision, highlighting the significance of utilizing knowledge and tools for optimal structural and functional recovery. Recent years have witnessed transformative advancements in medical instruments and surgical procedures, propelled by technological innovations that redefine our comprehension of anatomy. This chapter reflects a true rediscovery of the knee joint, as innovative tools offer novel approaches for observing and analyzing anatomical data. Hundreds of recent cadaveric studies and published body of literature indicate a shift in the perspective on the ligamentous knee anatomy, pointing to the new concept. The recognition that ligaments exhibit a flat structure is the key to figuring out the full spectrum of knee movement capabilities, echoing principles embraced by engineers favoring flat constructs. This chapter emerges as a fundamental resource of anatomical insights, contributing to the advancement of surgical practices and improved patient outcomes in the realm of knee ligament surgery.