Sol LeWitt's Wall Drawings represent a seminal body of work within the conceptual art movement, highlighting his innovative approach to art-making and his deep interest in the interplay between art, space, and viewer interpretation. Initiated in 1968, these drawings marked a significant shift in LeWitt's practice, moving from the physicality of sculpture to the conceptual framework of drawing directly on walls. Over his career, LeWitt produced more than 1,200 wall drawings, executed not by the artist himself but according to his detailed instructions by assistants, demonstrating his belief in the idea of the artwork over its execution.

The Wall Drawings vary widely in style and methodology, starting from simple linear marks and progressing to complex color fields and geometric forms. Early works utilized graphite, crayon, and later, vivid ink washes and brightly colored acrylics, reflecting a gradual evolution towards more dynamic and colorful compositions. LeWitt's instructions for these works were precise in terms of the design but allowed for variation in execution, leading to unique iterations of the same concept with each installation. This method paralleled musical composition, where the score remains constant, yet its performance can vary greatly.

Significant installations and retrospectives of LeWitt's Wall Drawings, such as the massive exhibition at MASS MoCA, encompass works spanning his entire career. This retrospective, housed in a historic mill building, features 105 large-scale drawings and emphasizes LeWitt's pioneering role in establishing the wall drawing as a critical form within contemporary art. The exhibition showcases the diversity of LeWitt's practice, from simple geometric patterns to complex color-filled shapes that play with the viewer's perception of space​ (MASS MoCA)​.

LeWitt's work was deeply theoretical, often rooted in predetermined systems that dictated the creation of the drawings. This approach resulted in pieces that explored all permutations of a concept, such as every two-part combination of lines and arcs or series of drawings exploring variations of geometric forms and their arrangement on the wall. His work in the late 20th century introduced more organic forms and saturated colors, moving away from the strict geometric abstraction of his earlier pieces​ (Wikipedia)​.

His work has been featured in numerous exhibitions worldwide, including at the Museum of Modern Art (MoMA), which has hosted installations highlighting the breadth and depth of LeWitt's wall drawings. One notable work, "Wall Drawing #260," showcases LeWitt's exploration of geometric forms using white arcs and lines on black walls, exemplifying the precision and creativity that characterizes his instructions-based art. These installations underscore LeWitt's lasting impact on the conceptual art movement, highlighting his innovative use of drawing as a means to explore mathematical and geometric principles through art​ (The Museum of Modern Art)​.

LeWitt's Wall Drawings underscore the transformative power of simple concepts executed in complex arrangements, embodying the essence of conceptual art where the idea or concept behind the work is more important than the physical object itself. Through this lens, LeWitt challenged traditional notions of authorship, artistry, and the permanence of art, making a lasting impact on the trajectory of contemporary art.