This is the 8986th most frequent Turkish word.
tanındığı
"Tanındığı" means "that is recognized" or "where/when it is recognized" depending on context.
In this sentence, 'tanındığı' is used to describe the period when Evliya Çelebi was recognized for being a traveler.
Evliya Çelebi, gezginliğiyle tanındığı dönemde birçok yer görmüştür.
Evliya Çelebi saw many places during the time he was known for his traveling.
Here 'tanındığı' relates to the specific competition by which the person became recognized or famous.
Onun tanındığı yarışmada birçok ünlü isim de yer aldı.
Many famous figures were also present at the competition he was known for.
'Tanındığı' in this context refers to the historical structures for which the city is recognized.