The ornamental design for a buildingportal, substantially as shown and described.
FIG. 1 is a side elevational view of a portal for a building, showing my
new design;
FIG. 2 is a camera eye perspective view looking toward the left relative to
the door of the portal of FIG. 1, showing my new design, the camera being
located centrally with respect to FIG. 1;
FIG. 3 is a camera eye perspective view looking toward the center of the
door of the portal of FIG. 1, showing my new design, the camera location
being the same as in FIG. 2;
FIG. 4 is a camera eye perspective view looking toward the right relative
to the door of the portal of FIG. 1, showing my new design, the camera
location being the same as in FIGS. 2 and 3.
The undisclosed sides are plain and unornamented with the rear side
substantially following the contour of the front side.