crest represents wisdom, and night visits; the gavel, authority and decision-making. the shield itself is derived from that of st bartholomew's hospital (the oldest extant hospital site in the uk). its chevron in these arms represents a roof (of the house in which general practice takes place), and day and night (black/white) alluding to the 24-hour commitment of gps to their patients. the lamp represents enlightenment, the importance of study/research, and links with the lamp of nursing. the doctor's compassionate and healing relationship with their patient is represented by the white poppy (symbolising the relief of pain) and the blue gentian (representing the restorative and rehabilitative role of the gp). the supporters are a unicorn (from the arms of the society of apothecaries, the forerunners of general practitioners in the uk and in whose hall the college of general practitioners was first housed, but also representing medicine), and a lynx (from the arms of the company of barbers and subsequently the royal college of surgeons, representing surgery). the spots on the lynx indicate its all-seeing nature, which is thought appropriate for general practice. the motto is cum scientia caritas (compassion with knowledge). from 1962 the headquarters of the college were at 14 princes gate, kensington, london. by 1970 the college had 7,500 members.: 124 in late october 2012 the college moved into new headquarters at 30 euston square, camden, london. the building includes a clinical skills assessment centre (csa) which means that the college has the capacity to assess several hundred candidates during sittings that are held throughout the year. concern has been expressed about the effect on the headquarters when re-development of euston station takes place to accommodate the new high speed two development. criticism the rcgp has been criticised for its support of the fossil fuel industry by hosting the 2020 oil and gas uk exploration conference at its london headquarters. this was cancelled after a petition by members raised concerns.