The first talk on the inaugural day of the webinar was delivered by Dr. Alejandra Moreno Toscano, who captivated the audience with her presentation on the Codex Cruz Badiano. This fascinating 16th-century document detailing the medicinal use of plants in pre-Hispanic Mexico served as a starting point to explore the relevance of ancestral knowledge in today's sustainability context. Dr. Moreno Toscano highlighted how the Codex serves as a valuable bridge between indigenous wisdom and the Western world, illustrating the transformative potential of cultural exchange. Through her exposition, she revealed the holistic vision ancient Mexicans had regarding the relationship between humans and nature, a fundamental concept resonating deeply with modern sustainability principles. With great skill, the expert drew parallels between the content of the Codex and the work of Nezahualcoyotl, emphasizing how both reflect a profound understanding of the natural environment and its responsible management. Beyond its historical value, Dr. Moreno Toscano emphasized the remarkable relevance of this ancestral knowledge, noting that many of the plants described in the Codex are still used in traditional medicine and contemporary gastronomy. This inaugural presentation not only established a solid conceptual framework for the "A Prototype for Sustainability: Tezcotzingo in Australia" project but also underscored the importance of preserving and disseminating Mexican cultural heritage globally. Dr. Moreno Toscano's talk made it clear that ancestral knowledge is not just a relic of the past but a living source of inspiration and potential solutions for the sustainability challenges we face today.