Sirius and Orion Over Washington
The Congress of Isis and Osiris just so happens to happen above... Congress.
Washington D.C. and many of it's buildings and monuments are laid out according to the cardinal directions with the streets running due NS and EW.
In the map of Washington D.C. below, due east is up and the star chart shows the constellation of Orion rising due east over Washington D.C., as it has done every day for the past two hundred years.
Orion's belt points towards Sirius, the brightest star in the sky, and while Orion is rising and low on the eastern horizon, Orion's belt is vertical, pointing to Sirius below.
In relation to the fixed stars, the sun rises later each day due to the rotation of the earth around the sun.
The sun rises just after Sirius at the latitude of Washington D.C. on August 15. This is known as the heliacal rising of Sirius. Prior to this time of year, the sun is above or too close to the horizon for the rising of the star to be visible.
Ancient Egyptians based their calendar on the heliacal rising of Sirius, which signaled the onset of the annual flooding of the Nile. Christians celebrate the Assumption of the Virgin Mary on August 15, linking the Assumption to the first appearance of Sirius/Isis in the sky just before dawn.
Orion has also set due west at the latitude of Washington D.C. for the past two hundred years.
From the viewpoint of the Capitol building, Orion sets right behind the Washington Monument. Setting in the west, Orion's belt is horizontal, pointing to Sirius setting south of due west.
From the viewpoint of the Capitol building, Sirius sets over the Potomac River, on the alignment of Maryland Avenue. The bright star above Orion is Aldebaran, the alpha star in the constellation of Taurus.
From the viewpoint of the Capitol building, Aldebaran sets over the White House, on the alignment of Pennsylvania Avenue.
Source
It has already been established that the Goddess can be symbolized by an owl.
Columbia and the Constellation of Virgo
The District of Columbia has more astrological symbols than and other city in the world. The capitol city was built from the ground up with a specific esoteric design.
There were many changes however, and some things didn't go exactly to plan.
In David Ovason’s book, The Secret Architecture of our Nation’s Capital ... The District of Columbia and its Federal City were arranged, according to Ovason, so that the constellation of Virgo and its goddess symbolism dominates the structure.
Ovason notes that the right triangle of first magnitude stars that contains the constellation Virgo, Arcturus, Regulus and Spica, can also be found in the plan of the Federal city marked by the location of the Capital, the President’s House and the Washington Monument.
And he also notes that the consecration ceremonies for these sites all include prominent astrological connections to Virgo...
This earth/sky alignment can be seen every year, weather permitting, around August 10th, as the sun sets down the Pennsylvania avenue sight line from the Capital, the great triangle enclosing Virgo appears in the darkening sky.
It was not as obvious 200 years ago when the plan was laid out, but now, at the moment of culmination, the alignment is clear and unmistakable.
As Ovason insists, it is plain that from its inception, the District of Columbia, and the Federal City,
“was intended to celebrate the mysteries of Virgo - of the Egyptian Isis, the Grecian Ceres and the Christian Virgin."
Source
http://www.bibliotecapleyades.net/sociopolitica/esp_sociopol_washingtonDC09.htm