During the Summer of 2006 and 2019, Jacksonville Main Street hosted professional sign painters from around the world called Letterheads or Walldogs to develop heritage-based public art projects throughout the historic central business district. The result was a collection of murals that highlight Jacksonville’s rich history. The murals were created and installed during week-long events, dubbed “The Jacksonville Walldog Extravaganza” in 2006 and “Wham Bam Mural Jam” in 2019. The Four Corner Churches was a digital addition to the existing projects in 2010. Jacksonville Main Street intends to add to the collection over the coming years.