Hermes Guillén has taken part in projects such as:  

– Bell-gable of the Cistercian Convent in Cañas (La Rioja).
– Restoration of the Portico of the Seu de Gandía (Valencia).
– Restoration of the central nave of the Convent of San Francisco, in Morella (Castellón).
– Restoration of a… Cross in Calahorra (La Rioja).
– Restoration of the Tower of the Plaza de la Paz, in Haro (La Rioja).
– Restoration of the building of the Bells and Pinnacles of the Tower of the Cathedral of Santo Domingo de la Calzada (La Rioja).
– Restoration of the Cloister of the Monastery of Valvanera (La Rioja).
– Restoration of the Palacio de los Mansos de Zúñiga, Canillas de Río Tuerto (La Rioja).
– Reconstruction of the walls of the Archaeological Site of Contrebia Leukade, in Aguilar de Río Alhama (La Rioja).
– Restoration of the Muro del Revellín, in the Walls of Logroño (La Rioja).
– Reconstruction of the columns of the Cultural Centre in Uruñuela (La Rioja).
– Reconstruction of arches of a cloister in the Chapel of Alberite (La Rioja).
– Restoration of the façade and balcony of the Casa de la Villa, in Los Arcos (Navarra).
– Restoration of the vaults and interior vertical walls of the Church of Fuenmayor (La Rioja).
– Restoration of the access pórtico to the Church of Lardero (La Rioja).
– Reconstruction of the Trujal in Yécora (Álava).
– Rehabilitation of the Palacio de Espartero (Museum of La Rioja), in Logroño.
– Remodelling of the access to the Tower of the Cathedral of Santo Domingo de la Calzada (La Rioja).
– Restoration of the north façade and balcony of the Town Council of Santo Domingo de la Calzada (La Rioja).
– Rehabilitation of the Mansion in Cuzcurrita de Río Tirón (La Rioja), current Hotel Teatrisso.
– Interior paving of the Chapel of the Abejas, in Santo Domingo de la Calzada (La Rioja)
– Restoration of the old military buildings of Murrieta, in Logroño, current Palace of Justice of La Rioja.
– Restoration and reconstruction of the Culture House in Lardero (La Rioja).