The city councils shall have the care and superintendence of the city buildings, all city property and all public squares and streets; and the power to sell or let what may be legally so disposed of, and to purchase property, real or personal, for the use of the city, whenever the interests or convenience of the city shall require it.
RSA 47:5
1846, 384:18. 1855, 1699:18. GS 44:5. GL 48:5. PS 50:5. PL 54 :5. RL 66:6.