My partner was given an oil painting in 1990 and told that it was valuable. He was also told that the artist name is Viveca Rubidous but I think that is likely misspelled.....possibly Rubioux. The painting is mostly blues with some red of eight riders on horseback, possibly military in nature as the riders are all wearing some type of helmet and seem to be carrying swords or lances. The signature seems to be Viva. Any help with this matter will be greatly appreciated. Thanks, SuZ