San Bernardino is the county seat of San Bernardino County, the largest organized county in the contiguous United States by area, but smaller than several boroughs and census areas in Alaska. Various state courts (for civil, criminal and juvenile trials) operate under the auspices of the Superior Court, San Bernardino District (formerly Central Division prior to the unification of the Superior and Municipal Courts in 1998). Currently, the Superior Court of California county courthouse is located at 351 North Arrowhead Avenue. It consists of a four-story building of steel and concrete construction built in 1927. A six-story addition was added in the 1950s. Currently, the 1926 structure is being retrofitted. A new courthouse, located at 247 West Third Street, opened in 2014, which houses civil courts.