- 1912
箭杆胡同20号宅院。此院坐北朝南，院落四边均为17米（其中东南部分缺角）。因基地条件所限，宅门开设于东北角。院内正房和倒座房仅三间，东侧设两间厢房，西侧设墙，为三合院，该院小巧，组合形式灵活。宅门为蛮子门一间，建筑为合瓦硬山式过垄脊，简朴亲切，曾为陈独秀旧居。
The residence at No. 20 Jian’gan Hutong is a north-facing courtyard. The four sides of the courtyard are all 17 meters long, with a missing corner in the southeast. Due to the limitations of the site, the main gate is located at the northeast corner. The courtyard contains only three rooms in the main house and three rooms in the opposite house. There are two side rooms on the east and a wall on the west, forming a three-sided courtyard. The courtyard is small but has a flexible layout. The main gate is a “Manzi” gate, and the architecture features a simple and amiable hard mountain style with a ridge roof. It used to be the residence of Chen Duxiu.
