Alva ( port. Alva ) - a district (fregezia) in Portugal , part of the Viseu district. It is an integral part of the municipality of Kashtru Dayre . 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 546 people for 2001 . It covers an area of 9.87 km².
|Region||Central Region (Portugal)|
|History and Geography|
|Population||546 people ( 2001 )|
|Density||55.3 people / km²|
The patron saint of the area is Martin Tursky ( port. São Martinho ).