[PAR] [TLE] Joachim Rittstieg [SEP] Joachim Rittstieg (born February 23, 1937 in Berlin, died May 27, 2014 in Rendsburg) was a secondary school mathematics teacher who had travelled in Mexico, Guatemala, Belize, Honduras and El Salvador, and had studied the Mayan calendar system as a 40-year hobby. [PAR] [TLE] Maya calendar [SEP] The Maya calendar is a system of calendars used in pre-Columbian Mesoamerica and in many modern communities in the Guatemalan highlands, Veracruz, Oaxaca and Chiapas, Mexico.
[PAR] [TLE] Joachim Rittstieg [ SEP ] Joachim Rittstieg ( born February 23 , 1937 in Berlin , died May 27 , 2014 in Rendsburg ) was a secondary school mathematics teacher who had travelled in Mexico , Guatemala , Belize , Honduras and El Salvador , and had studied the Mayan calendar system as a 40-year hobby . [PAR] [TLE] Maya calendar [ SEP ] The Maya calendar is a system of calendars used in pre - Columbian Mesoamerica and in many modern communities in the Guatemalan highlands , Veracruz , Oaxaca and Chiapas , Mexico .
How long and in what capacity did Joachim Rittstieg study a system of calenders used in pre-Columbian Mesoamerica?
How long and in what capacity did Joachim Rittstieg study a system of calenders used in pre - Columbian Mesoamerica ?
40-year hobby
40-year hobby