How did the vault patterns of late Gothic German churches change after the 15th century?

During the 15th century, German masons were renowned for their expertise in vault design, particularly within hall churches. Initially, these vault patterns were characterized by the use of predominantly straight lines.

However, toward the end of the 15th century, this design approach shifted as straight-line patterns were replaced by curvilinear designs. These new, more complex patterns were typically arranged in two distinct layers, a development that became particularly prominent in eastern European regions such as Annaberg and Kuttenberg.1