The preservation of cultural heritage increasingly benefits from technological advances that provide innovative ways for monitoring, conserving, and managing valuable cultural assets. Restoration and conservation, particularly of immovable cultural heritage such as buildings and monuments, face ongoing challenges from environmental pressures and climatic stressors, anthropogenic damage and geographical dispersal. Emerging challenges, particularly the growing impact of climate change, are significantly affecting the preservation of cultural heritage. New technologies, including photogrammetry, 3D digital technologies (modeling, scanning and visualization) and AR/VR applications, are revolutionizing the documentation and preservation of cultural heritage sites. The integration of networks of smart sensors based on IoT improves real-time monitoring of the environmental conditions around the monument (temperature, humidity, light exposure, air quality, etc.), potential structural changes (vibrations, cracks, etc.). In contrast, the creation of digital twins – virtual replicas of cultural monuments – enables continuous observation and simulation of environmental impacts and structural decay over time. Artificial intelligence is critical in analyzing the collected data and enables proactive decision-making to anticipate and mitigate potential threats (Preventive Conservation). Solutions powered by renewable energy further support the sustainability of these conservation efforts in remote sites. To harness advanced technologies for the preservation of cultural heritage on site, extended sensing and information networks and sophisticated control systems are needed to capture, integrate and manage multiple data streams in an efficient and sustainable way. Climate adaptation measures need to be integrated into conservation practices to build resilience. Current technological advances pave the way for new intelligent solutions, enabling simulations and predictive measures that not only respond to current threats but can also anticipate and prevent future risks through proactive interventions. This article examines the diverse role of technology in the preservation of immovable cultural heritage, from current applications to the evolving conservation requirements of cultural heritage to the new opportunities presented by information and communication technologies.