<P> Some distance from the centre of the old city is the Moorish castle (or palace) Aljafería, the most important Moorish buildings in northern Spain and the setting for Giuseppe Verdi's opera Il trovatore (The Troubadour). The Aragonese parliament currently sits in the building . </P> <P> The churches of San Pablo, Santa María Magdalena and San Gil Abad were built in the 14th century, but the towers may be old minarets dating from the 11th century; San Miguel (14th century); Santiago (San Ildefonso) and the Fecetas monastery are Baroque with Mudéjar ceilings of the 17th century . All the churches are Mudéjar monuments that comprise a World Heritage Site . </P> <P> Other important sights are the stately houses and palaces in the city, mainly of the 16th century: palaces of the count of Morata or Luna (Audiencia), Deán, Torrero (colegio de Arquitectos), Don Lope or Real Maestranza, count of Sástago, count of Argillo (today the Pablo Gargallo museum), archbishop, etc . </P> <P> On 14 June 2008, the site of Expo 2008 opened its doors to the public . The exhibition ran until 14 September . </P>

Where does the last name zaragoza come from