A place of the county of Huesca, belonging to the municipality of Casbas. It has about 63 inhabitants. Altitude: 582 meters on the sea level. It's from Huesca 30 kilometers. Gentile: siesino.
      The place was simply denominated Sieso, while it depended on the Huesca capital, as sidewalk. Then, when getting its municipal independence, in 1834, it took like last name this that certainly already came it inherited and passed to call itself Sieso of Huesca. It maintained own City council up to 1960-1970 in that it united to Casbas.
     Sieso of Huesca is located next to its access track, in the right margin of the Formiga river. Two streets configure its urban structure, in land that begins already to be broken, with the mountain of Guara to the bottom. The place belonged to the monastery of Montearagón, for the king's donation Pedro I made in 1099. Later on, in November of 1188, Alfonso II of Aragon gave Sieso to the abbess of Casbas that would already show the dominion during centuries. April of 1275, 8 Inés, the abbess, and Ato de Foces, named arbiters to specifying the limits among Morrano, Yaso, Sieso and Castelnóu, and August 19 of 1295 Jaime de Aragón exempted to the monastery of Casbas of the seigniorage tax and other more in its places, among those that figured the own Sieso.
     The place had 21 homes at the end of the XV century. By the middle of the XIX one, Madoz pointed out 140 houses, 47 neighbors and 291 persons, and at the beginning of 1900 it arrived to the 500 inhabitants.
     Sieso is scarcely a main street, the biggest street that crosses it in a longitudinal way, parallel to the highway; the rest is narrow, short and traverse, serpentine, bent streets, with typical corners that will behave, or to the field, or to the great square of the Church.
     The urban architecture shows us the classic contrast among the restored houses and the few that have not been it. There is prevalence of housings respectfully rehabilitated; and some very old ones, as that of the Calle Estrecha, where is the most veteran house in the town that assure me it dates of 1596, and in that the restoration works have begun timidly. They count me that Sieso has its origins in the XII century, although I suspect that there were previous establishments.

     The urban nucleus still gets rich with buildings of the XVIth and XVIIth centuries, although most corresponds to the XIXth. The current times have been good to introduce some reformations and retouches more or less guessed right. The parochial church is dedicated to San Martin and is of romanesque origin, with later reformations. It is composed at the present time of three ships, the central the covered by canyon vault, while in the lateral are of domes and starry. The XIIth and XVIth centuries appear harmoniously combined. Same happens with the bell tower that conserves its romanesque base, while the chapitel is octogonal, of brick, faithful to the Mudejar technique. The sacristy covers with vault of trough of the XVIII century. The church is restored in its exterior, but tell me that there is a lot to fixing in its interiors that the subsidies arrive with dropper, although its aspect has improved very much.
      A hermitage, that of Nuestra Señora del Olivar conserves some Gothic vestiges.
      Sieso of Huesca celebrates its patron parties November 11, in honor of San Martin that is also holder of the church. On February 3 it likewise is honored San Blas, and on eve night the traditional bonfires ignite still.



     The lineage of the Sieso exists, noble family native to the locality of his surname and placed in Saragossa already documented from the beginning of the XVIIth century.

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