Valmiki Ramayana Sundara Kanda Sarga 2 Shloka 51

सः that, प्रासादमालावितताम् stretched with a row of mansions, काञ्चनराजतैः with gold and silver, स्तम्भैः with pillars, शातकुम्भमयैः made of gold, जालैः fretwork, गन्धर्वनगरोपमाम् resembling the city of gandharvas, सप्तभौमाष्टभौमैः च seven and eight storied mansions, स्फाटिकसंकीर्णैः inlaid with crystals, कार्तस्वरविभूषितैः decorated with gold, तलैः floors, महापुरीम् the grand city, ददर्श saw.

Hanuman saw the city stretched with rows of buildings all over,with seven or eight storied mansions, which had pillars of gold and silver, windows with fretwork of gold, inlaid with crystals, floors decorated with gold, resembling the grand city of gandharvas.