Like the Dayuan site, the Dalong site was discovered by chance: While the Taipei City Urban Redevelopment Office was working on the Six Arts Plaza in the Dalongdong Cultural District, a local came across the remains of what was possibly a fortified compound dating to the Qing dynasty. Last September, the Taipei City Cultural Affairs Bureau put together a committee to evaluate the site and asked Liu I-chang to begin a preliminary dig.
大龍國小遺址的發現，也是起於一個偶然。緣自台北市都市更新處在進行大龍峒文化園區「六藝廣場」工程施工時，地方文史工作者發現疑似清代「輦輪堡」遺跡，台北市文化局旋即於去年 9 月辦理文資價值會勘，同時委託考古專家劉益昌進行探坑試掘計劃。