Old Castle of Castellví de la Marca Monument · Castellví de la Marca, Alt Penedès, Barcelona Count Borrell of Barcelona sold it in 977 to Unifred, and in 1023 it passed to Guillem I of Castellvell; it controlled the frontier with Muslim territory and was in the hands of the Montcada family, the counts of Foix, the Zúñiga family (1549) and the Fajardo family (1618), until reaching the counts of Sobradiel in 1856. It stands at 468 metres, on a steep hill of the Montmell mountain range, from where it dominates the lower Penedès plain; it formed part of a network of watch castles linked with those of Marmellar and Montmell, and with those that were built at their feet on the plain, such as those of Banyeres, Santa Oliva or Calafell. Today only the circular keep survives, badly damaged, with an interior diameter of 220 centimetres. Photo: Antoni Grifol (CC BY-SA 3.0) What to see and do in Castellví de la Marca