Most people take for granted the buildings that house post offices. When you visit the Museum of Postal History in Delphos you can view several artifacts that relate to the building of the Delphos Post Office in 1933. It is a magnificent structure and was built in a rather short time frame - they began in March and completed the building in November of that same year. It was built with some local materials such as lumber from Horine Lumber Company on S. Clay Street. Bricks came from Putnam County. The sandstone, granite, marble and terrazzo floors came from a different part of the country. The original glass windows above the box section in the lobby were their major source of ventilation. While the skylight that can still be seen on the roof provided much needed light. Unfortunately during the energy crunch of the 70s, the ceiling was placed over the opening.