Structural Health Monitoring (SHM) emerged as one of the most advanced fields in civil engineering, attracting growing interest due to the deteriorating condition of many civil structures and infrastructures. Public awareness has also been raised by recent structural failures, which have drawn attention to the importance of monitoring and safety. Most of these structures were built during the post-World War II economic expansion and, in the absence of adequate maintenance, are now reaching the end of their estimated service life almost simultaneously. This situation highlights the need for strategies that can accurately assess structural conditions with the support of data, while minimising frequency and cost of manned inspections.