Samjeondo is an historically important, though politically controversial, monument. Imagine for the moment that you are a patriotic Korean in 1636, then you would certainly not want to accept vassal status to the hated Qing empire. But here it is, phallic upthrust and all, on the very spot where the ceremony of surrender had been conducted. Koreans would rather forget it, but it can't be ignored.
The monument has been buried, uncovered, and relocated several times in its history, depending on the political climate. It was last relocated in 2010, about a year after this photo was taken. The photo shows its former location.