Palazzo Terzi in on the exterior part of Bergamo Alta's hill, overlooking the plane up to the Appennini. It's among the high school, the Cathedral, Santa Maria Maggiore and Piazza Vecchia. The cosy Piazza Terzi has been excavated and it has been projected in 1738 by Filippo Alessandri. He has been able to harmonize architectural elements of 16th and 17th century.

The façade is linear with a balcony and with a sculpture of Sanz that converse with the sculpture situated in the square's niche. One side of the square is delimited by an high wall with a balcony on the top, from here your eye is guided through the big door and columns to the terrace with 2 sculptures that stand upon the plane.

In 1610 Terzi's family bought a first building of 16th century, then Alvise Terzi gradually bought several buildings on the hill that from Via Rosate goes down to Via San Giacomo. In 1631 Alvise started to set up and to decorate the palace.

The central hall was doubled in height, so the lowest part of the monumental chimney is made of marble while the highest part is made of plaster.

Alvise Terzi called Gian Giacomo Barbello (1590-1656), Cristoforo Storer ( born in Costanza first half of the18th ), the father of Fra' Galgario to decorate "a fresco".

Around the big hall there are others halls:
- The hall of "Soprarizzo veneziano": a silk velvet of several colours with flowers and decorations lines the room. The ceiling has frescoes by Carpoforo Tencalla (1623-1685) and the floor is designed by Caniana.
- The mirrors' room: it's lined by big mirrors with gilt plaster frames; the wonderful floor is by Caniana and it shows baskets of fruits and flowers and other abstract patterns; the frescoes in the ceiling are by Storer. Between the wall and the frame of the velvet was hidden the flag of the voluntary troops after the Restoration (1848-49), it is now displayed in the Risorgimento museum.
- The red room: it is lined with silk "damasco", the frescoes are by Storer and the walls are interrupted by four precious mirrors and a chimney of the 18th century.
- The bedroom: it's lined by yellow and green silk of the 17th century and frescoes by Storer on the ceiling. It opens on a sort of "winter garden" which is a sort of green house covered by glasses, on the walls there are "trompe l'oeil" with trees and flowers. A large window opens to the plane and the gardens and houses below.
- The music hall: it is a cosy room decorated by very light and wavy gilt plasters (stuccoes) of the 18th century by Camuzio.
- The "Tiepolo" hall: once it was a bedroom. On the ceiling there is a canvas in a frame painted by Tiepolo and Capella.
- The dining room: through the entrance we reach to the dining room, where there is a large table of the 18th century and frescoes by Barbello.

All the rooms are still lit by candles. 
The most interesting thing is situated in the first entrance room in the part of the Palace from the 16th century, because it is decorated by rare dark plasters (stuccoes) showing medallions with figures and ribbons of fruits and leaves.