Wow! Talk about recycling! In around 1887, the original building for L.A. High School (built in 1871) was moved from Poundcake Hill (around 1st and Temple Streets) to Fort Moore Hill (near the historic plaza. Both those hills have gone now.) This photo shows the school being moved. I’m not sure what, exactly, is going on here. Did they raise it up on a platform and then move the platform? However they managed it, it’s a jaw-dropping sight to see.
Below is an 1873 photo of the Los Angeles High School building in its original location on Poundcake Hill: