agar ▁fe ud atory ▁of ▁Arc ot ▁who ▁founded ▁the ▁Th an jav ur ▁N ay ak ▁dynast y . ▁His ▁principal ▁queen ▁was ▁M urt im amba . ▁ ▁Names ▁▁ ▁Ach uth appa ▁N ay ak ▁was ▁named ▁by ▁Se v appa ▁N ay ak ▁after ▁the ▁V ij ay an agar ▁Emperor ▁Ach y uta ▁De va ▁R aya . ▁ ▁During ▁his ▁lifetime , ▁Ach uth appa ▁N ay ak ▁was ▁also ▁known ▁as ▁Ch in na ▁Se va ▁Ach y ut ha ▁and ▁Se v appa ▁Ach y ut ha . ▁ ▁Re ign ▁▁ ▁Ach uth appa ▁ruled ▁for ▁a ▁total ▁of ▁ 5 4 ▁years ▁during ▁which ▁Th an jav ur ▁experienced ▁architect ural ▁and ▁cultural ▁development . ▁While ▁the ▁earlier ▁part ▁of ▁his ▁reign ▁was ▁peace ful , ▁there ▁was ▁war fare ▁with ▁Muslim ▁and ▁Portuguese ▁inv aders ▁towards ▁the ▁end . ▁He ▁maintained ▁peace ful ▁relations ▁with ▁the ▁V ij ay an agar ▁k ings ▁and ▁assist ed ▁them ▁in ▁their ▁campaign s . ▁Ach uth appa ▁was ▁assist ed ▁by ▁his ▁minister , ▁the ▁legend ary ▁G ov inda ▁D ik sh itar . ▁ ▁Battle ▁of ▁Vall amp rak ara ▁▁ ▁In ▁ 1 5 7 9 , ▁the ▁Mad ur ai ▁N ay ak ▁king ▁V ira ppa ▁N ay ak ▁declared ▁his ▁independence ▁from ▁V ij ay an agar . ▁Ach uth appa ▁fought ▁V ira ppa ▁along ▁with ▁the ▁V ij ay an agar ▁Emperor ▁V enk ata ▁II