Arch ( port. Arca ) - a district (fregezia) in Portugal , part of the district of Viseu . It is an integral part of the municipality of Oliveira de Frades . It is part of a large metropolitan area Big Viseu . According to the old administrative division, it was part of the province of Beira Alta . Included in the economic and statistical subregion of Dan Lafoynes , which is part of the Central region . The population is 387 people for 2001 . It covers an area of 9.11 km².
|Region||Central Region (Portugal)|
|Municipality||Oliveira de frades|
|History and Geography|
|Population||387 people ( 2001 )|
|Density||42.5 people / km²|