Complex sentence: The siege and liberation were skillfully used by Francisco Franco to establish his dominance with his followers and the newspaper Ultra named the building "El Alcázar" of Spain, although at first was a daily that referred to it as an historical landmark.
Split into simpler sentences: The siege and liberation were used by Francisco Franco to establish his dominance with his followers. The newspaper "Ultra" named the building "El Alcázar" of Spain, although at first was a daily that referred to it as an historical landmark.