Answer
1414 marked the rediscovery of De architectura, an ancient Roman treatise on architecture by Vitruvius. This rediscovery had a profound impact on Renaissance architecture, as it provided architects with a theoretical framework and practical guidance based on classical principles. The treatise's influence can be seen in the works of renowned architects such as Leon Battista Alberti and Andrea Palladio, who incorporated Vitruvius's ideas into their designs and writings.