Field research

• Current project: “Two Early Clas­sic Maya mu­rals: new texts and ima­ges in Maya and Teo­ti­huacan style from La Suf­ri­ca­ya, Petén, Gua­te­ma­la"- further information
• 1990, 1991, 1995-today: Expeditions which lasted several weeks tot he Petén-district in Guatemala to save and document hieroglyph inscriptions;
• 1984, 1986-1998, 2001: Anually several research trips to Señor and Tixcacal Guardia, Quintana Roo and the Cayo-District in Belize to investigate the history of the yucatec Maya;
• Recording of oral traditions, research about genres of verbal art to investigate oral traditions (altogether 20 month);
• 1987-1993, 1998: Research in Copán, Honduras for a conjoint investigation with David Stuart and Linda Schele;
• 1989-1992, 1994, 1995: "Pro­ject Epi­gra­pher" at the Ca­ra­col-Pro­ject, Be­li­ze (leaded by Arlen and Diane Chase) (every year one month);

Other activity

Coeditor of „Mexicon“; Academic advisor to Arqueología Mexicana; Realization of annual seminars about history of the maya for maya organizations in Antigua, Guatemala and collaboration with Ox­la­ju­uj Keej Maya Ajtz'iib'; Research associate and advisor of the special exhibition “the world of the maya” at the Roemer- and Pelizaeus Museum, Hildesheim; Academic consultancy for TV and radio features; Organisation of the “Maya Meetings” and the 3^rd Sibley Conference with the topic "Al­te­red Sta­tes of Con­scious­ness" at the University of Texas, Austin