The Penang State Mosque (Masjid Negeri) on Jalan Masjid Negeri (Green Lane) was completed in 1980 to serve as the official mosque of Penang state. It is a striking late-modernist building — a low complex of buff-coloured walls, slender pillars, and a vast central prayer hall topped by a soft-edged octagonal dome the colour of bronze. A separate 60-metre minaret stands beside it.
The interior can hold around 5,000 worshippers and is decorated with calligraphy, marble and stained glass. Non-Muslim visitors are welcome outside prayer times — robes provided at the entrance, shoes removed before the prayer hall. It is a working state mosque rather than a tourist showpiece, so the atmosphere is sober and serious; come with respect. Less central than the Kapitan Keling but worth the side trip for the architecture and the contrast with the older Mughal-style mosque downtown.