Ezekiel 40:14-16

14He made [the measurement of] the side pillars sixty cubits high; the gate extended all around to the side pillar of the courtyard.

15From the front of the entrance gate [on the outside] to the front of the inner porch (portico) of the gate [the distance] was fifty cubits.

16There were shuttered windows looking toward the guardrooms, and toward their side pillars within the gate all around, and likewise for the porches. And windows were all around inside; and palm tree decorations were on each side pillar.