Mari-Castle is a historic summer estate at 41-43 South Main Street in Randolph, Vermont.

His estate, now used primarily for professional offices, was listed on the National Register of Historic Places in 1990.

The main house is an 1886 Queen Anne Victorian, which was extensively redesigned in 1894–95 to have a more Chateauesque appearance.

The original main drive includes a rustic stone bridge across a narrow ravine, which was built about 1895.

[2] Albert Brown Chandler was born in Randolph, and had an early career as a telegraph operator for Western Union.