Labor Day weekend is here, and some builds deserve more than a casual afternoon.
This year, we’re putting the spotlight on five of LesDiy’s most ambitious building projects — from nearly 100,000-piece fantasy architecture to a 14-motor RC engineering crane.
Four selected mega MOCs are 30% OFF, while the LTM-11200 Engineering Crane gets a massive $300 discount.
If you have been waiting for an excuse to finally start that oversized display project, this is it.
✔️ The Best Labor Day MOC Deals
🏆 TOP PICK
MOC-64235 The Seven Rings Part A — 30% OFF
99,548 PCS | 91.2 in Wide | Seven Massive Building Levels
Nearly 100,000 pieces, seven independently buildable rings, and a finished width of more than 7.5 feet make this one of the most ambitious fantasy building projects in the LesDiy catalog.
[SHOP THE SEVEN RINGS PART A →]
🏛 BEST ARCHITECTURE DEAL
MOC-65795 Sagrada Familia — 30% OFF
10,083 PCS | 24.4 in Tall | Designed by JeongwonE
A large-scale interpretation of Barcelona’s famous basilica with nine major building sections and a highly detailed vertical silhouette.
⚔️ BEST FANTASY FORTRESS
MOC-181067 Barad-dûr — 30% OFF
13,793 PCS | 44 in Tall | Six-Module Construction
A towering dark-fantasy centerpiece designed for serious Middle-earth collectors.
⛪ BIGGEST ARCHITECTURE PROJECT
MOC-43974 Notre Dame de Paris — 30% OFF
63,181 PCS | 57.4 in Long | 500+ Hour Build
An exhibition-scale Gothic cathedral with five giant modular sections and more than 63,000 pieces.
🏗 BIGGEST DOLLAR SAVING
LTM-11200 14-Motor RC Engineering Crane — $300 OFF
12,205 PCS | 14 Motors | 57 in Long
Remote-controlled steering, outriggers, boom functions, counterweight movement and more make this the mechanical standout of the sale.
[SHOP THE RC ENGINEERING CRANE →]
1. MOC-64235 The Seven Rings Part A
Our Labor Day Top Pick
Some Labor Day builds are designed to be finished over the weekend.
This is not one of them.
The MOC-64235 The Seven Rings Part A is a colossal 99,548-piece fantasy city designed and authorized by STEBRICK.
At approximately 231.8 × 116.7 × 131.2 cm / 91.2 × 45.9 × 51.7 in, the finished model is closer to an exhibition installation than a conventional building set.
The city rises through seven major rings, with each level further divided into large modular sections. Individual rings can even be completed and displayed separately while you work toward the full city.
That modular construction is especially useful for a project of this scale. Instead of facing nearly 100,000 pieces as one enormous build, you can treat each level as its own milestone.
Why It’s Our Labor Day Top Pick
Because a 30% discount matters a lot more on a mega MOC.
The Seven Rings Part A is the kind of long-term project many collectors watch for months before finally committing to it. Labor Day gives serious fantasy builders a much stronger reason to start.
And no — you are probably not finishing it this weekend.
But you can certainly start it.
Great Labor Day Buy:
Nearly 100,000 pieces, seven modular levels, huge exhibition dimensions, and one of the largest fantasy architecture builds available from LesDiy.
[SHOP MOC-64235 THE SEVEN RINGS PART A →]
VIDEO: The Seven Rings – ComicCon Stuttgart 2021
2. MOC-65795 Sagrada Familia
Best Labor Day Architecture Deal
Want a major architectural build without committing an entire room to it?
The MOC-65795 Sagrada Familia offers a more manageable entry into large-scale architecture.
Designed and authorized by JeongwonE, the model contains 10,083 pieces and reaches approximately 62 cm / 24.4 in high.
The design recreates the basilica’s recognizable vertical structure through layered facades, towers, openings and dense exterior detailing.
For easier construction, the model is organized around a base plus nine major building sections.
That makes it large enough to feel like a serious collector project without reaching the extreme scale of Notre Dame or The Seven Rings.
Why It’s a Great Labor Day Buy
The biggest appeal here is balance.
You get:
- More than 10,000 pieces
- A substantial finished height
- Recognizable landmark architecture
- Modular construction
- A strong display presence
without moving into a 50,000+ piece project.
At 30% OFF, it is one of the easiest recommendations in this Labor Day lineup for architecture collectors.
Great Labor Day Buy:
A major Barcelona landmark build with impressive scale, detailed exterior construction and a much more manageable footprint than the truly gigantic MOCs.
[SHOP MOC-65795 SAGRADA FAMILIA →]
3. MOC-181067 Barad-dûr
Best Fantasy Fortress Deal
If The Seven Rings is about building an entire fantasy city, Barad-dûr is about creating one towering centerpiece.
Designed and authorized by magurean.paul, the MOC-181067 contains 13,793 pieces and measures approximately:
74 × 56 × 112 cm
29.1 × 22 × 44.1 in
The model focuses heavily on vertical presence, dark architecture, towers, bridge structures and the unmistakable silhouette of the fortress.
The entire model is divided into six modules, making assembly and transportation easier.
It has also been physically built and tested by the designer, an especially useful detail for a model of this size.
Why It’s a Great Labor Day Buy
Barad-dûr sits in a very appealing middle ground.
It is enormous enough to dominate a display but still much smaller than The Seven Rings.
At 30% OFF, it becomes especially attractive for collectors who want a major fantasy centerpiece without taking on a near-100,000-piece city.
Great Labor Day Buy:
13,793 pieces, six modular sections and a dramatic 44-inch finished height make it one of the strongest display-focused fantasy builds in the sale.
[SHOP MOC-181067 BARAD-DÛR →]
VIDEO: LEGO LOTR Barad-dûr MOC Upgrade
This is an independently designed and designer-authorized fan MOC. It is not an official Lord of the Rings, Warner Bros. or Middle-earth licensed product.
4. MOC-43974 Notre Dame de Paris
Best for Serious Architecture Collectors
Then there is Notre Dame.
Designed and authorized by STEBRICK / Stefano Mapelli, this model contains an extraordinary 63,181 pieces.
The finished cathedral measures approximately:
145.7 × 51.8 × 101.9 cm
57.4 × 20.4 × 40.1 in
The model recreates the cathedral through its long nave, western facade, transept, choir, apse, roof structures, twin towers and extensive Gothic exterior detailing.
To make such a huge project practical, the cathedral is split into five major sections:
Facade
Nave
Transept
Choir
Apse
The updated Version 2.0 also includes structural improvements, revised instructions and alternative solutions for selected harder-to-source elements.
And this is not a weekend project.
Estimated building time can exceed 500 hours.
Why It’s a Great Labor Day Buy
Because a 30% discount on a 63,181-piece flagship build is very different from saving 30% on a small set.
For advanced architecture builders who already know they want a long-term centerpiece project, Labor Day is exactly the kind of event worth waiting for.
Great Labor Day Buy:
More than 63,000 pieces, five giant modules, exhibition-scale dimensions and potentially 500+ hours of building.
[SHOP MOC-43974 NOTRE DAME DE PARIS →]
VIDEO: MOC-43974 Notre Dame de Paris
5. LTM-11200 14-Motor UCCS RC Engineering Crane
Best Engineering Deal — Save $300
After four massive display builds, it is time for something that moves.
The LTM-11200 RC Engineering Crane contains 12,205 pieces, measures approximately 145 cm / 57 in long, and weighs around 15.5 kg when complete.
But the real headline is the motor system.
The package includes:
- 5 XL motors
- 1 L motor
- 6 M motors
- 2 servo motors
- 2 Bluetooth lithium battery systems
That gives the crane a total of 14 motors.
Remote-controlled functions include driving, steering, crab-style movement, support-arm deployment, counterweight lifting, boom rotation and hook operation.
Additional boom extension and lifting systems are manually controlled.
Why It’s a Great Labor Day Buy
Because this is not just a display model.
It is a huge engineering project with motors, steering systems, mechanical linkages and working crane functions.
And unlike the other four deals, this one comes with a straightforward headline:
SAVE $300
For builders who care more about gears, motors and mechanisms than towers and cathedrals, this may actually be the best deal of the entire event.
Great Labor Day Buy:
12,205 pieces, 14 motors, remote-controlled functions and a full $300 discount.
[SHOP THE LTM-11200 RC ENGINEERING CRANE →]
Which Labor Day Build Should You Choose?
Still deciding?
Here is the short version.
Want the biggest fantasy project?
Choose The Seven Rings Part A.
Want landmark architecture without going completely enormous?
Choose Sagrada Familia.
Want a towering fantasy centerpiece?
Choose Barad-dûr.
Want one of the most extreme architecture builds available?
Choose Notre Dame de Paris.
Want motors, mechanics and RC functions?
Choose the LTM-11200 Engineering Crane.
There is no small project in this lineup.
That is exactly the point.
Labor Day Is a Good Time to Start Something Big
A three-day weekend may not be enough to finish these builds.
But it is more than enough time to start one.
This Labor Day, selected mega MOCs are 30% OFF, while the LTM-11200 RC Engineering Crane is $300 OFF.
If one of these models has been sitting on your wishlist, waiting probably will not make it any smaller.
LABOR DAY SALE
30% OFF SELECTED MEGA MOCs
+ $300 OFF LTM-11200
BUILD BIGGER. SAVE BIGGER.
Promotional availability may change during the event. Please check individual product pages for current pricing, availability and shipping information.
LEGO® is a trademark of the LEGO Group. The LEGO Group does not sponsor, authorize or endorse LesDiy. Fan-designed models based on third-party fictional properties are independently created MOCs and are not official licensed products unless specifically stated otherwise.