Kashi, the capital of the earth

यद्दिनं हि समारभ्य हरः काश्यामुपागतः |

तदारभ्य च सा काशी सर्वश्रेष्ठतराऽभवत् || 40 ||

 

And starting from that day when Lord Shiva arrived in Kashi, that Kashi became the utmost best (place on the earth, also "capital" of the earth).