Seismic risk is a global challenge that spans multiple disciplines. Archaeology plays a crucial role, offering significant value in preserving and understanding Cultural Heritage. This book, through the European PROTECT project, explores how archeoseismology applied to architecture can make a meaningful impact. Focusing on the historic center of Siena, it presents new methodologies and innovative findings, offering a multidisciplinary approach that uncovers fresh perspectives on a complex urban and social context, as well as its relationship with both medieval and modern earthquakes.