New Delhi : The Heritage Line ' (ITO-Kashmere Gate corridor) of the Delhi Metro was today opened to the public with Union Urban Development Minister M Venkaiah Naidu and Delhi Chief Minister Arvind Kejriwal flagging off the New section. Union Science & Technology Minister Dr Harshvardhan was also present on the occasion. The 5.17 km long 'Heritage Line , which includes four stations--Delhi Gate, Jama Masjid, Lal Quila and Kashmiri Gate, was flagged off by Union Urban Development Minister M Venkaiah Naidu and Delhi Chief Minister Arvind Kejriwal from Metro Bhawan. The 'Heritage Line' will be open for the public from 1200 hrs. This is completely underground section includes four stations -- Delhi Gate, Jama Masjid, Lal Quila and Kashmiri Gate. The stations on this section have been decorated with the panels and art works depicting the glory of the by-gone era. DMRC had tied up with the art and culture body, INTACH, for artworks at the station. With the commissioning of this section, the entire 9.37 kilometre long Central Secretariat-Kashmere Gate section is now operational and become a part of the 43.40 kilometre long Escorts Mujesar-Kashmere gate violet corridor. This line gives easy access to some important historical places, as the stations were located right next to Red Fort, Jama Masjid and the Feroz Shah Kotla Stadium. DMRC officials say that the completion of this phase was technically the most 'challenging' and involved seven Tunnel Boring Machines, and during the tunnelling process many a times the TBM's even got stuck. There were some realignments done several times for the tunnels as the Geo surveys were not in place. Jama Masjid station had to be shifted 45 metres laterally and 75 metres longitudinally pertaining to the geographical conditions. The DMRC official also said that for the first time 'Dream Gates' were installed as a pilot project at two entry points.