The authors of this paper explore modern investigative methods for Orthodox historic churches that have been affected by past earthquakes and subsequently consolidated using the available materials, knowledge, and techniques of their respective periods. These churches often incorporate a range of materials, including concrete, masonry, steel, and wood, introduced or replaced at various times, reflecting the changing approaches to building conservation and repair. The paper examines how contemporary techniques can be applied to assess these churches, considering their intricate histories of consolidation and repair. By leveraging advanced tools and methodologies, the authors aim to better evaluate both the structural integrity and historical value of these buildings. This investigation is vital for developing effective conservation strategies and ensuring the preservation of these important cultural landmarks for future generations. In Romania, historic churches have experienced considerable damage from earthquakes over time. In the Oltenia region, between 1838 and 1977, five major earthquakes, each exceeding magnitude 7 ML, severely impacted Orthodox churches constructed with brick masonry and lime mortar. After the 1940s earthquake, consolidations utilized contemporary materials like metal ties and reinforced concrete. Following the collapse of the central tower at the Church of the Holy Archangels Michael and Gabriel in Craiova during the 1977 earthquake, the tower was reconstructed with reinforced concrete columns and beams. However, the differing mechanical properties of the original brick masonry and the new reinforced concrete led to cracks forming where these materials meet. This article addresses the damage caused by using irreversible consolidation materials and presents results from in situ tests. It also includes a structural analysis to evaluate the church’s behavior historically, currently, and in the future.