Final answer:
Leiningen constructed a horseshoe-shaped structure on his farm reflecting the historical architectural element known as the horseshoe arch used in various constructions.
Step-by-step explanation:
Leiningen had constructed a horseshoe-shaped structure around three sides of his property. This design echoes the historical use of horseshoe arches in architecture, which can be traced back to the Visigoths and are characteristic of Western Islamic architecture, spreading from Morocco to Egypt.
The adaptation of a horseshoe shape has also been seen in various historical structures, such as farmhouses with piazzas, cloisters, and even the arrangement of fences in landscape art. In each of these examples, the horseshoe motif serves practical or aesthetic functions, whether for enclosing space, directing movements, or creating visual interest.