Within the Mediterranean region, particularly in Italy, masonry aggregate buildings constitute a significant portion of the architectural heritage. These structures result from the gradual transformation and interconnection of originally isolated structural units over time, shaping the evolution of urban areas. Assessing the seismic performance of masonry aggregates is challenging due to the significant uncertainties arising from interactions between individual units. Moreover, existing building codes and standards lack comprehensive guidance on this topic, impacting the reliability of modeling assumptions and the accuracy of analytical outcomes. Consequently, studying masonry aggregates at an elementary level, with similar regular units, to isolate the effects of unit interconnectivity has recently gained interest.