Mareku ( port. Mareco ) - a district ( fregeziya ) in Portugal , is part of the district of Viseu . It is an integral part of the municipality of Penalva do Castelo . 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 128 people for 2001 . It covers an area of 3.93 km².
|A country|| Portugal|
|Region||Central Region (Portugal)|
|Municipality||Penalva do Castelo|
|Population||128 people ( 2001 )|
|Density||32.6 people / km²|