Petrie counted and measured 203 courses in 1882. Today, 201 are present.

**
How many completed courses?**

- C.P. Smyth, 1880, p. 95: "Supposed completed number of courses, including the original

topmost corner-stone = 211.."

- Craig B. Smith, 2006, p. 102: "..hypothetical figure 218 courses."

How many courses did the Pyramid have, when it was completed at the time of Khufu?

**
First, how much is missing?**

Estimated originally height is 146.71 m (Petrie: "5776.0").

201 cources is present with a height of 137.38 m.

Then, the top of the Pyramid is missing about 9.33 m (146.71 m - 137.38 m).

**
Second, how high is 1 course?**

Suppose that the average height of the 10 topmost and remaining courses is the same as for

the missing courses, then we can get a good estimate about the number af missing courses.

Average of top of course 191 in NE- and SW corner is 5191.4" or 131.86 m over the pavement.

Height in total for the 10 topmost and remaining courses is (137.38 m - 131.86 m =) 5.52 m.

Height of 1 average course is 0.552 m.

**
17 courses missing?**

If each missing course had the height 0.552 m, then the pyramid had further 16.9 courses

(9.33 m / 0.552 m per course).

The number of missing courses could be 17, and the completed pyramid had 201 + 17

courses. And the topstone as the 218th course.

-----

Used dimensions, see Petrie
*The Pyramids and Temples of Gizeh* and go to Plate 8.

Course 201, top of, in NW-corner 5407.9" or 137.36 m.

Course 201, top of, in SW-corner 5409.2" or 137.39 m.

Course 201, top of, average 5408.55" or 137.38 m over pavement

Course 191, top of, in NE-corner 5190.6" or 131.84 m

Course 191, top of, in SW-corner 5192.2" or 131.88 m

Course 191, top of, average 5191.4" or 131,86 m over pavement

About uncertainty in estimation of the average height of the 10 topmost and present courses:

Course 196 in NE-corner is highest: 23.9" or 60.7 cm.

Course 195 in NE-corner is lowest.: 19.8" or 50.3 cm.

**
How big is the area on the top? **

The area of the remaining coreblocks was 122 sq.m. in 1882, when Petrie measured-

the top of course 201. When alle blocks in layer 201 were present, both coreblocks and

casingblocks, the area was about 214.6 sq.m.

Calculation, when present height is 137,38 m and sideangle 51° 52':

137.38 m / 1.2738 = 107.85 m. And twice the distance is 215.70 m. When subtracted from

the baseline, the sidelenght of the area on top is: 230.35 m - 215.70 m = 14.65 m.

Then, the area is 214.6 sq.m.

**
The topstone - which material?**

The reconstructed topstone found

by Rainar Stadelmann at Sneferu's

Red Pyramid. *Photo: Egyptsarchive.co.uk*