September 4, 1906, was a joyful day in Fredericksburg. On that date, many of the town’s 1,600 or so residents came out to celebrate the blessing and dedication of the new Church of the Immaculate Conception. The church was, and remains, an architectural gem. Designed in a modern, German Gothic style, its rough white limestone walls frame high-arched entryways and tall, elegant stained-glass windows. The spire atop its right-side tower reaches about 130 feet in the air and could be seen for miles from every direction of the Hill Country. A reporter from the Southern Messenger, a Catholic newspaper in San Antonio, noted the “very large attendance of the faithful at all the services, many coming from great distances in order to be present.”
Another church dedication—with a similarly devoted and well-traveled assemblage—took place on October 22 in High Hill, a German hamlet north of Schulenburg. The Nativity of Mary, Blessed Virgin Catholic Church was smaller than its counterpart in Fredericksburg, but the redbrick edifice exhibited urbane Gothic character and solemnity with its own jewel-toned windows. Its steeple extended 110 feet in the air atop a centered tower and could be seen for miles from every direction of the Fayette Prairie.
Known today as “St. Mary’s” in their respective communities, these two churches continue holding regular religious services and are registered historic landmarks. Their architect, Leo M. J. Dielmann of San Antonio, was a lifelong practicing Catholic who designed religious buildings to stand out, to be admired, and to endure. Not every Dielmann church survives, but at least sixty steeples that rise today into the Texas sky came from his blueprints.
Both St. Mary’s churches are listed in the National Register of Historic Places, along with thirteen other churches from all over Texas, for their historically significant “decorative interior painting.” Additional churches have since been recognized for having similar interior treatments, which increases the number of what have become popularly known as painted churches. There may be as many as forty, but a statewide total isn’t known. Such highly adorned churches are found across the Southwest, though the term “painted church” is most often associated with Texas.
After nearly three years documenting more than two dozen painted churches with photographer Kirk Weddle for an upcoming book, I’ve learned that Dielmann designed more of them than any other architect in the state. Although the distinguishing symbolic and decorative artwork fell outside his professional métier (he wasn’t responsible for the painting), these remarkable buildings still represent a small, colorful segment of a much greater architectural legacy. Along with the many commercial and civic projects he designed in and around San Antonio, Dielmann’s churches brought modernity and sophistication to the Texas landscape as it grew into the twentieth century.
Elaborately painted or not, Dielmann churches, chapels, and other houses of worship appear in a range of architectural styles and building materials. Dielmann was flexible to meet the needs and financial means of individual congregations, which were by no means always Catholic. Nevertheless, his churches always expressed the sincerity of a skilled draftsman who was thoroughly devoted to his faith and German heritage and possessed an appreciation for individuals and communities devoted to theirs. The joie de vivre (perhaps more accurately Lebensfreude, the German word for the same keen enjoyment of life) that he brought to the drafting table is evident in the stone-and-timber walls, beneath the soaring ceilings, and at the tops of the noble spires.
Leo Maria Joseph Dielmann was born in San Antonio on August 14, 1881, to Maria Gros Dielmann, a first-generation Texan raised by German parents, and John C. Dielmann, originally from Hellenhahn-Schellenberg, Germany, who became successful in the city’s construction and building-supply sectors. Along with five siblings, Leo grew up in a house his father built at 136 Lavaca Street and worshipped at St. Joseph’s, an elegant Gothic Revival church with painted murals, constructed by and for German Catholics in 1871.
Spending time in and around these thoughtfully designed buildings left an impression on young Leo. Writing in the Journal of Texas Catholic History and Culture in 1991, Willard B. Robinson stated, “Leo was reared . . . in a historic and electric environment that must have influenced both his artistic and religious sensibilities.” Robinson also pointed out that by apprenticing for his father, Dielmann “energetically developed the skills of a journeyman stone mason.”
The Dielmanns sent Leo to San Antonio’s St. Mary’s College and then to Idstein, Germany, around 1899 to study architecture and architectural engineering. In Europe, the youthful Dielmann experienced the old century giving way to the new—quite literally, when he visited Paris in 1900 for the Exposition Universelle, an enormous, months-long showcase of international architecture, technology, and culture that attracted millions.
Returning in 1901 to San Antonio (with a population then around 53,000), Dielmann possessed solid German training along with worldly perspectives bubbling through his veins. In November 1902, while working for his father, he also starred in a production of the H.M.S. Pinafore, staged by the German singing Liederkranz club at St. Joseph’s Hall (built by Dielmann’s father in 1892).
This was no isolated occasion. Dielmann continued amateur singing for years while increasingly devoting himself to social, religious, and civic organizations such as the Sons of Hermann, the Beethoven Männerchor, and the St. Joseph’s Society. After visiting another international exhibition, the 1904 St. Louis World’s Fair, Dielmann set to work realizing his robust architectural ambitions.
Educated on European Gothic precedents, and with a solid construction background, he began designing modern churches, most often on a smaller scale appropriate to individual communities. St. Joseph’s Chapel (1905), in rural Comal County southwest of New Braunfels, was fashioned with yellow brick and a center tower that appears to be a prelude for the grander Gothic Revival works that followed in Fredericksburg and High Hill.
During this era of population growth, Texas was a Wild West of professional architects with competing visions, says Kenneth Hafertepe, professor and chair of museum studies at Baylor University and author of A Guide to Historic Buildings of Fredericksburg and Gillespie County. “There was sort of a building race at the turn of the century,” he says. “Everyone had steeple envy, and young architects like Dielmann had to make prominent statements. St. Mary’s reflected an ambition on the part of Fredericksburg Catholics to modernize and keep up with the times.”
In San Antonio, Dielmann also served as city building inspector (1909–12) and alderman at large (1913–14) and became a longtime trustee for the Carnegie-funded public library, which opened in 1903. When he married Ella Marie Wagner in 1911, his widening access to civic and business sectors was already resulting in commissions for schools, municipal buildings, commercial properties, and a few private residences. While raising three children, he also stayed in contact with the local chancery office, where many Catholic church building projects originated. Dielmann was a savvy networker, and this skill served him well, says architectural historian Ralph Newlan, who wrote a master’s thesis on Dielmann. “He knew the bishops, he knew the priests, he knew the civic leaders and businessmen. That provided him with a lot of work.”
Dielmann designed both Catholic and Protestant churches, including Second Baptist (1910) in San Antonio and Ebenezer Lutheran (1924) in Maxwell. He worked with Czech congregations, including for Guardian Angel Catholic Church (circa 1913), in Wallis, and Polish congregations, like for the major remodeling and enlargement (circa 1937) of Panna Maria’s Immaculate Conception of the Blessed Virgin Mary, built in 1877.
While Dielmann consistently favored the Gothic Revival style, he also deviated from it. He chose the trendy Beaux-Arts style, in which classical forms integrate with modern, monumental spaces, for the multifaith Main Post Chapel at Fort Sam Houston, in San Antonio. Also called the Gift Chapel, with its massive copper dome and three Roman arches, it emphasized width and depth (as well as strength) over the Gothic style’s verticality. When he dedicated the new but unfinished chapel in 1909, President William Howard Taft drew a crowd of more than 25,000 spectators, most of whom waited outside on the lawn. About 600 guests, including Dielmann and his father, who was supervising the chapel’s construction, attended ceremonies inside the auditorium-style nave, with a second-level loggia and an enormous domed ceiling. (The gift chapel has been closed since December 2022, reportedly due to mold and infrastructure concerns.)
Dielmann often did his own thing, sometimes against the wishes of the church leaders who hired him. In 1911 San Antonio bishop John W. Shaw wrote to Claretian missionaries who were planning a new church for the local Hispanic community: “Have you considered the problem of building yet? you [sic] will be well advised to try the Mission style.” But Dielmann, perhaps emboldened by the opportunity to contribute a major Catholic church to his hometown, instead chose yellow and red brick for a Neo-Romanesque edifice with a bell tower and steeple. (In 1944 the interior was first hand-painted with frescoes and stencils that provided its Byzantine character.)
Dielmann’s other churches are often found far away from San Antonio, in Abilene (Sacred Heart Catholic Church, 1931), Jarrell (Holy Trinity Catholic Church of Corn Hill, 1914), and Marshall (St. Joseph, 1926), among other places.
When Dielmann died, in December 1969, his requiem mass was held at the Sacred Heart Conventual Chapel, which has anchored Our Lady of the Lake University’s San Antonio campus since 1923. It’s Dielmann’s design: a unique and highly stylized blending of English and German late Gothic traditions that still looks so very much like a Dielmann, at least when you get to know a little bit about the man. As noted by Robinson, the Conventual Chapel was Dielmann’s proudest achievement. Despite being a departure from his beloved German Gothic Revival style, its spire reaches an impressive 193 feet and can be seen for miles in every direction.
