Albert Barnes Commentary Lamentations 2:7

"The Lord hath cast off his altar, he hath abhorred his sanctuary; He hath given up into the hand of the enemy the walls of her palaces: They have made a noise in the house of Jehovah, as in the day of a solemn assembly." — Lamentations 2:7 (ASV)

sanctuary - The holy of holies; the walls of her palaces are those of the sacred buildings.