interior, the addition of a sacristy, the placement of the present stained glass windows, and the expansion of the sanctuary. Architectural historians have divided the Precious Blood-related churches of western Ohio into four generations. Most of the first-generation churches were small frame structures; only four of these buildings (three of which are brick) – have survived; two have been converted for other purposes, one has been greatly modified, and only St. John's Church in Fryburg remains in a condition resembling its original state. St. Aloysius is a member of the second generation of churches, which comprises the buildings completed between 1865 and 1885. Most of these buildings were simple brick structures with small bell towers; conversely, St. Aloysius was the first church in the region to be designed with a tall tower. Its construction was a turning point in the ecclesiastical architecture of the region: after its construction, most of the area's churches were modified by the construction of similar towers, and later structures were generally designed likewise. Furthermore, Anton DeCurtins's commission to design the church at Carthagena, where he lived, led to similar requests from many other parishes: the churches of the third generation, built between 1885 and 1905, were characteristically large brick High Gothic Revival structures, dominated by tall towers, and designed by Anton or his sons. Stained glass windows The church interior is adorned with Munich-style stained glass windows. The windows depict the life of the church patron saint, Aloysius Gonzaga, saints associated with other places having names similar to "Carthagena", and saints revered in German culture. Subjects of the pictorial windows (as written on the windows, translated from German) St. Aloysius receives the first Holy Communion from the hand of St. Charles Borromeo. St. Aloysius is surprised by his parents in prayer. St. Florian, Soldier and Martyr, Patron against fire hazard. St. Isidore Archbishop of Seville, 636. Born 560 in Cartagena, Spain. St. Notburga Virgin and Maid Servant. Died 1313. St. Perpetua, Mother and Martyr, 202 in Carthage, Africa. St. Peter Claver teaches the Negro slaves in Cartagena, South America. St. Deacon Lawrence hears of his approaching death from St. Pope Sixtus. Related properties Two school buildings – one frame and one brick – were built approximately west of the church. These buildings were built for the Black community that lived in Carthagena before the current parish was in the area. In order to better serve