“This Old House,” which has been on the air for 23 years, is the highest-rated home-improvement show in television history. Here are some fast facts about the show.

“This Old House” airs on more than 322 public television stations across the United States, reaching more than five million weekly PBS viewers. The series is also distributed in syndication, where it is aired on 93% of the U.S. market, and on cable where “This Old House Classics” is seen on HGTV.

“This Old House” can also be seen worldwide on Discovery UK, XYZ in Australia and Armed Forces Radio and Television Service.

It is the most recognized home-improvement series on television, with 15 Emmy awards and 64 Emmy nominations. In 2002, “This Old House” was nominated for four Daytime Emmy awards in the categories of Outstanding Service Show, Outstanding Directing in a Service Show, Outstanding Achievement in Single Camera Editing and Outstanding Service Show Host.

The show's Web site, at www.thisoldhouse.com, has photos and descriptions of all the projects broadcast on “This Old House.” The site also lists all the subcontractors and suppliers.